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Projects on Karma

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Projects on Karma

5,240 projects found

Ashu

Created on Nov 17, 2025

🗓️ DailyCheckIn – Wallet-Based Attendance DApp DailyCheckIn allows users to mark their daily attendance through their crypto wallet. Each wallet address can check in once every 24 hours, and the record is stored permanently on-chain. This project is ideal for beginners learning Solidity and exploring wallet authentication, timestamp validation, and on-chain record keeping. It can easily be extended to build loyalty systems, streak trackers, or community engagement…
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chainspin

chainspin

Created on Nov 17, 2025

Traditional online games often hide their random number generation and outcomes, leaving players uncertain about fairness. chainspin solves that by putting the game logic on-chain, where every bet, random seed, and final result can be publicly verified. This project was built as a learning and demo project for beginners to explore: *Smart contract programming in Solidity. *Blockchain randomness using commit–reveal. *Event-driven architecture and provable outcome.
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XWallet

Created on Oct 28, 2025

XWallet is a decentralized shared wallet platform designed for families and organizations to manage finances collaboratively using stablecoins. It enables features like spend limits, reimbursements, role-based access, and controlled spending—all while leveraging the stability and transparency of blockchain.
2 grants40 milestones0 roadmap items
celo-on-contract

celo-on-contract

Created on Nov 17, 2025

🩺 Patient Vitals On-Chain A simple and transparent Solidity smart contract for recording and updating patient vital signs (like heart rate, temperature, and blood pressure) directly on the blockchain. This project demonstrates how healthcare data can be made more secure, immutable, and decentralized using blockchain technology. 📘 Project Description The Patient Vitals smart contract allows patients to record their vital signs on-chain. Each patient is identified by their wallet address,…
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votepoll

votepoll

Created on Nov 17, 2025

This decentralized voting system is a blockchain-based application developed using Solidity to provide a secure, transparent, and tamper-resistant method for conducting elections. It allows users to cast votes that are permanently recorded on a distributed ledger, eliminating the risks associated with centralized databases. The system ensures fairness by preventing unauthorized access, duplicate voting, and data manipulation. Every action is validated through smart contracts, offering…
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Attendance Validator

Attendance Validator

Created on Nov 17, 2025

A simple and transparent attendance validation system built on the Ethereum blockchain using Solidity. This smart contract ensures that attendance records are immutable, tamper-proof, and verifiable — perfect for institutions that value integrity and transparency. Github repo link : https://github.com/Pmskabir1234/MyBlockChain
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Higher or Lower – Simple Solidity Guessing Game

Created on Nov 17, 2025

Higher or Lower, a fun and beginner-friendly Solidity smart contract game! This project helps you understand how to build, deploy, and interact with a simple on-chain guessing game using Ethereum smart contracts. it is a simple smart contract where players guess if the next randomly generated number will be higher or lower than the current one. project github link: https://github.com/aditisaha-ui/higherlower
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demo-one-celo

demo-one-celo

Created on Nov 17, 2025

🩺 Patient Vitals Record – On-Chain Healthcare Data System A simple and beginner-friendly Solidity smart contract that securely records and updates patient vitals (like heart rate, temperature, and blood pressure) on the blockchain. 🧠 Project Description This project demonstrates how blockchain technology can be used to make healthcare data transparent, secure, and immutable. Built on Celo Sepolia Testnet, this smart contract allows hospitals or authorized entities to record and update…
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CeloRit

Created on Nov 17, 2025

CertiChain is a Solidity-based smart contract designed for organizations (like universities, training centers, or certification bodies) that want to issue verifiable digital certificates on the blockchain. It ensures that certificates are authentic, immutable, and easy to verify by anyone — without relying on centralized systems. GitHub link: https://github.com/RBDevScripts/CeloRit
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Gambler

Created on Nov 17, 2025

A simple Ethereum smart contract that simulates drawing random playing cards on the blockchain. Each draw is transparent, recorded on-chain, and linked to the user’s wallet address.
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Listify

Created on Nov 17, 2025

The Blockchain To-Do Manager is a decentralized, smart contract-powered task manager built with Solidity. It helps you manage personal tasks securely and transparently on the Celo Sepolia Testnet 🌐. Simple, clean, and perfect for beginners learning blockchain development! 💡
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Vega-Forest

Vega-Forest

Created on Nov 17, 2025

Humanity needs a green world that will contribute our life
1 grant0 milestones0 roadmap items

CareerChain

Created on Nov 17, 2025

JobApplicationTracker is a beginner-friendly Solidity smart contract that stores job applications immutably and records employer responses in an append‑only history. Applications point to off‑chain applicant data (for example an IPFS CID), while responses (status updates, interview invites, rejections, etc.) are appended by authorized responders and cannot be modified or removed. This repository is ideal for anyone learning Solidity and building decentralised hiring tools, audit‑friendly…
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InheritChain

Created on Nov 17, 2025

DigitalWill is a blockchain-based smart contract system that lets users create tamper-proof digital wills, deposit cryptocurrency, and automate inheritance distribution after a configurable inactivity period. It provides beneficiary management, a "proof of life" activity confirmation, personalized final messages, transparent event logging, and gas-efficient on-chain execution — all without intermediaries. Repository:…
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DecentraRPS

DecentraRPS

Created on Nov 17, 2025

DecentraRPS is a decentralized Rock Paper Scissors game built on Solidity,allowing two players to compete by stakingERC-20 tokens. The gam ensures transparent,trustless,and automated outcomes without intermediaries. All moves,stakes,and results are securely recorded on-chain.
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Funfi

Created on Nov 17, 2025

**this project is build for the beginners learning solidiyty and celo block chain this program shows an output of Hello Blockchains** https://github.com/ankan21042007-roy/contract.-funfi.sol
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CeloBloom

CeloBloom

Created on Nov 16, 2025

CeloBloom is a blockchain-native donation + social platform on Celo where users create transparent campaigns, donate with cUSD, and grow a community through a Social-style feed — all with WalletConnect, real-time tracking, and a bloom-themed mobile-first UI.
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VotingApp

VotingApp

Created on Nov 17, 2025

A decentralized voting application built using Solidity and deployed on the Celo Blockchain (Sepolia Testnet). This project enables secure, transparent, and tamper-proof voting by storing every vote on-chain. The contract allows the owner to add candidates, while users can vote only once, ensuring fairness and trust through blockchain technology.
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Celo Quiz Arena

Created on Nov 16, 2025

Celo Quiz Arena is a decentralized, interactive quiz platform built on the Celo blockchain, where users can participate in trivia games, learn about various topics, and earn rewards in cUSD or CELO.
1 grant3 milestones0 roadmap items
EmpowerFi

EmpowerFi

Created on Aug 29, 2025

EmpowerFi is a decentralized microfinance platform built on the CELO blockchain, designed to provide accessible, low-cost financial services to underserved communities. By leveraging CELO’s mobile-first infrastructure and stablecoins (e.g., cUSD), EmpowerFi enables users to access microloans, savings pools, and financial literacy tools directly from their mobile phones, fostering economic empowerment in regions with limited banking infrastructure
4 grants0 milestones0 roadmap items

VOTE CHORI

Created on Nov 17, 2025

The VOTECHORI Project is a decentralized smart contract built to demonstrate how blockchain logic can automate and secure transactions without the need for intermediaries. It serves as a great starting point for developers who want to understand how smart contracts work, how they are deployed, and how users can interact with them on-chain.
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Decentralized Smart Bank-Solidity Project

Created on Nov 17, 2025

This project is a** Decentralized Smart Bank** built on the Celo Sepolia Testnet using Solidity. It enables users to securely deposit and withdraw CELO directly on the blockchain without relying on traditional banks or centralized intermediaries. Built with transparency, immutability, and trustlessness in mind, the contract records every transaction on-chain and ensures secure fund management using a reentrancy guard. The system also supports direct ETH/CELO transfers and provides the owner…
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Secure Notepad

Secure Notepad

Created on Nov 17, 2025

ecure Notepad is a decentralized notepad built on the Ethereum blockchain. It allows users to write, edit, share, and manage their notes directly on-chain, ensuring transparency, immutability, and user ownership. ⚠️ Note: Blockchain data is public. For real privacy, you should encrypt notes off-chain or store them on IPFS and save only the CID in the contract.
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first.sol

Created on Nov 17, 2025

DeckChain is a decentralized on-chain deck management system that allows users to create, shuffle, and draw cards securely using blockchain technology. It’s perfect for card-based games, NFT collectibles, or any decentralized app where fairness and transparency matter. Every deck and card is stored on-chain, ensuring that game logic is verifiable, immutable, and tamper-proof. This project is designed for developers learning Solidity and decentralized game logic. github link:…
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jokes

Created on Nov 17, 2025

“The ‘jokes’ app showcases a collection of curated humorous content, aimed to brighten up the day of its users.”
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shadeMint

shadeMint

Created on Nov 17, 2025

ShadeMint is a next-generation color management platform that integrates creative design tools with blockchain technology. It allows users to mint unique color palettes, verify ownership, prevent duplication, and collaborate on visually consistent branding systems. The platform supports real-time palette generation, palette sharing, and on-chain uniqueness guarantees, making ShadeMint a powerful tool for UI/UX designers, developers, and digital artists.
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NoteChain

Created on Nov 16, 2025

NoteChain is a blockchain-powered decentralized application that allows users to create and store text-based notes directly on-chain. Every note is permanently recorded on the blockchain, ensuring transparency, immutability, and public accessibility. This project demonstrates how everyday utilities like note-taking can be enhanced using decentralized technology, providing an educational example for blockchain developers and enthusiasts.
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NrmChain

NrmChain

Created on Nov 16, 2025

NrmChain is a simple on-chain number guessing game built with Solidity. It introduces blockchain beginners to smart contract development, randomness generation, and basic game logic — all deployed on Ethereum-compatible networks.
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NFT-Minter

NFT-Minter

Created on Nov 16, 2025

The NFT-Minter Project is an open-source, blockchain-based application designed to simplify the NFT creation process. It allows users to upload their NFT images, generate JSON metadata for the NFT, and interact with a dynamic NFT marketplace. Beginners can contribute to the project while learning how to develop decentralized applications (dApps). By offering easy integration with blockchain technology, the project aims to empower users to engage in the world of NFTs, regardless of technical…
0 grants0 milestones0 roadmap items
rise-in-web3

rise-in-web3

Created on Nov 16, 2025

This project is a simple and transparent attendance tracking system built on the blockchain using Solidity. It allows an administrator to mark attendance for participants and stores each record immutably with a timestamp. Perfect for events, workshops, or academic institutions looking to ensure auditability and trust.
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Fair On-Chain Puzzle

Fair On-Chain Puzzle

Created on Nov 16, 2025

Fair On-Chain Puzzle is a Solidity-based smart contract that brings a classic memory matching game to the blockchain. Unlike traditional games where hidden data lives on a central server, this game embraces blockchain transparency — every move, every shuffle, every card is publicly verifiable. This project demonstrates one of the most fundamental truths of blockchain development: 🧠 Nothing on-chain is truly private. Even “private” variables can be read from storage — so fairness must be…
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celo_pro

celo_pro

Created on Nov 16, 2025

DeckChain is a simple blockchain-based project built using Solidity for beginners learning how to create and interact with smart contracts. The idea of XYZ is to explore decentralized management of digital “cards” and “decks,” where users can create, shuffle, and draw cards securely on the Ethereum blockchain — all without relying on centralized servers. This project demonstrates core blockchain principles: Ownership of digital assets Data stored transparently on-chain Deterministic execution…
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Decentralized Note Storing System (XXX)

Decentralized Note Storing System (XXX)

Created on Nov 16, 2025

🚀 Project Description The Decentralized Note Storing System is a blockchain-based application that allows users to securely manage small pieces of text data (notes) in a transparent and immutable way. Each Ethereum or Celo wallet address can store one note, which can be updated anytime by the owner. This project demonstrates core concepts of blockchain development: Smart contract functions Data storage using mappings Events and user interactions Transparency and decentralization MY GITHUB…
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HaarJeet

HaarJeet

Created on Nov 16, 2025

HaarJeet is a simple, beginner-friendly smart contract game deployed on the Celo Sepolia Testnet. It allows users to place a bet, choose between 0 or 1 (like heads or tails), and instantly see whether they win or lose — all handled transparently on the blockchain. This project is designed for learners who want to understand: How decentralized betting logic works How to deploy and interact with smart contracts How events and payouts function in blockchain games
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SkillMint

Created on Nov 16, 2025

SkillMint is a blockchain-based certification system that issues verified skill NFTs to learners, developers, and professionals. When someone completes a verified course or program, the admin (contract owner) can mint a Skill NFT containing details such as the skill name, description, recipient address, and issue date. This ensures authentic, permanent proof of skill verification — completely on-chain, without relying on centralized servers or certificates. Github link :…
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BlockGate

BlockGate

Created on Nov 16, 2025

BlockGate is a simple and beginner-friendly Solidity smart contract that records and tracks on-chain job submissions for transparent review. It’s designed to help developers understand how blockchain can be used to verify, store, and manage digital entries securely. BlockGate provides a decentralized way to store and retrieve job or task submissions on the blockchain. Each submission is timestamped, publicly viewable, and permanently recorded — ensuring transparency and trust in how job…
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My CELO Project

My CELO Project

Created on Nov 16, 2025

BlockdareBasic is a lightweight, on-chain challenge logging system built using Solidity. It enables anyone to record a verifiable challenge entry—containing the challenger’s address, a brief description, and a timestamp—directly onto the blockchain. Designed for fairness and transparency, every entry is permanent and publicly accessible, making it ideal for competitions, gaming communities, and audit-friendly environments. With a compact structure and event-based updates, the contract ensures…
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ChainHealth

ChainHealth

Created on Nov 16, 2025

ChainHealth is a simple verifiable medical data ledger for individuals. It allows users to register themselves and store verifiable hashes of medical records on-chain for audit and verification — without exposing private data. Built using Solidity (compiled to Solana via Solang), it provides a privacy-preserving, tamper-proof registry for patient health record hashes.
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Quizchain

Quizchain

Created on Nov 16, 2025

The On-Chain Quiz System is a blockchain-powered quiz application where questions, answers, and user scores are stored on the blockchain to ensure transparency, trust, and tamper-proof results. This project demonstrates how smart contracts can be used for education, certification, and fair evaluation by removing the possibility of cheating or data manipulation. Github link :https://github.com/ankit79600/Quizchain
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Proofcert

Proofcert

Created on Nov 16, 2025

ProofCert is a beginner-friendly Solidity smart contract that enables users to store and verify their earned credentials immutably on the blockchain. It’s designed to make academic and professional certificates permanent, verifiable, and tamper-proof, removing the need for centralized verification systems.
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Vibecoding2

Vibecoding2

Created on Nov 16, 2025

⚡ Simple Flash Loan Provider (Solidity) A beginner-friendly Flash Loan Provider smart contract built with Solidity (v0.8.19). This project demonstrates the core mechanics of flash loans — instant, no-collateral loans that must be repaid within the same blockchain transaction. 🧠 Project Description This project is a simplified educational example of how a flash loan works under the hood. Flash loans are commonly used in DeFi (Decentralized Finance) protocols for arbitrage, liquidation, and…
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wordfi.sol

Created on Nov 16, 2025

WORDFI is a blockchain-based word guessing game built with Solidity. Players try to guess a secret word within a limited number of attempts, and the smart contract automatically verifies the correct word once the game ends. https://github.com/aryan1gupta-ux/wordfi.sol
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vicky.sol

vicky.sol

Created on Nov 16, 2025

Traditional event ticketing systems often suffer from problems like counterfeiting, hidden fees, and centralized control. EventFi solves these issues by providing a trustless, transparent, and tamper-proof platform for managing event tickets. With EventFi, event organizers can: Create and manage their events on-chain. Sell tickets directly to users for a set price. Withdraw funds safely after ticket sales. And users can: Buy tickets securely using cryptocurrency (ETH). Own verifiable,…
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Biblioblock

Biblioblock

Created on Nov 16, 2025

Traditional book lending systems rely on centralized databases that can be edited, deleted, or lost. Biblioblock solves this by using blockchain technology to create an immutable ledger of book transactions. Every book addition, lending, and return is permanently recorded on-chain — forever traceable and verifiable. github link:- https://github.com/nathanpaul28/Biblioblock
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halloapp.sol

halloapp.sol

Created on Nov 16, 2025

HalloApp is a beginner-friendly Solidity smart contract that allows users to save Ether, withdraw funds, and view their transaction history — directly on the blockchain. Think of it as your decentralized savings account, where you’re your own bank.
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Library Management System

Created on Nov 16, 2025

The Library Management System (LMS) is a Solidity-based smart contract deployed on the Ethereum blockchain that enables a decentralized and transparent way to manage library operations. The contract allows the librarian, acting as the system owner, to add, update, and remove books from the catalog, while readers can securely borrow and return books. Every action—such as adding a book or borrowing one—is permanently stored on the blockchain, ensuring full transparency, accountability, and an…
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NumSum – Blockchain Guessing Game

Created on Nov 16, 2025

NumSum is a decentralized blockchain-based guessing game where players bet small amounts of ETH and try to guess the sum of two random numbers. If the guess is correct, the player instantly wins 2× their bet through an automated smart-contract payout.
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MatchRecords

Created on Nov 16, 2025

MatchRecords is a beginner-friendly Solidity project designed to store and display sports match results on the Ethereum blockchain. It demonstrates how structured data—like team names, scores, and timestamps—can be stored immutably on-chain, ensuring results cannot be altered after publication. GitHub Repository: https://github.com/swapnilsantra2-bit/records-match-results-transparently
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Presence-Tracker

Presence-Tracker

Created on Nov 16, 2025

This project demonstrates how to record attendance or presence data on-chain using Solidity. Each check-in is stored immutably on the blockchain with a timestamp. Github Link: https://github.com/ArnabKrPal/Presence-Tracker
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chain-memory 🧠 memochain

Created on Nov 16, 2025

memochain is a decentralized, Solidity-based smart contract that functions as a permanent on-chain memory vault. It enables users to store short text-based “memories” directly on the blockchain, ensuring that each entry is securely timestamped, author-verified, and publicly transparent. Every memory written to the contract becomes part of an immutable chain of thoughts — preserving user-generated content in a trustless and censorship-resistant manner. The project demonstrates how blockchain…
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