Open Source Java Blockchain Software
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Java Blockchain Software
View 1053 business solutionsBrowse free open source Java Blockchain Software and projects below. Use the toggles on the left to filter open source Java Blockchain Software by OS, license, language, programming language, and project status.
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Stop Storing Third-Party Tokens in Your DatabaseRolling your own OAuth token storage can be a security liability. Token Vault securely stores access and refresh tokens from federated providers and handles exchange and renewal automatically. Connected accounts, refresh exchange, and privileged worker flows included.
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MongoDB Atlas runs apps anywhereMongoDB Atlas gives you the freedom to build and run modern applications anywhere—across AWS, Azure, and Google Cloud. With global availability in over 115 regions, Atlas lets you deploy close to your users, meet compliance needs, and scale with confidence across any geography.
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Web3j
Lightweight Java and Android library for integration with Ethereum
Web3j is a lightweight, highly modular, reactive, type safe Java and Android library for working with Smart Contracts and integrating with Ethereum blockchains. This allows you to work with Ethereum blockchains, without the additional overhead of having to write your own integration code for the platform. Web3j integrates seamlessly with the Epirus Blockchain Explorer. Web3j provides full type-safe access to your blockchain applications. Plugins for leading build tools to simplify the developer experience. Create projects to work with new or import existing decentralized apps in a single command with the Web3j CLI. Simple to use framework for automated integration testing against networks within your IDE. Web3j is 100% open source and maintained by Web3 Labs. -
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Bisq
A decentralized bitcoin exchange network
Buy and sell bitcoin for fiat (or other cryptocurrencies) privately and securely using Bisq's peer-to-peer network and open-source desktop software. No registration is required. Get started in minutes. No need to wait for approval from a central authority. Trading takes place on a global P2P network of users running Bisq on their own machines. Bisq never holds your funds. Deposits held in 2-of-2 multi-sig wallets encourage safe, successful trades. Your data is stored locally on disk, and is never sent to a central server. Every Bisq node is a Tor hidden service by default. Code is open-source, and project strategy is discussed openly on Keybase and GitHub. We've made all this sophistication simple, make your first trade in under 10 minutes! Decentralized governance for a decentralized exchange, built on top of Bitcoin. -
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Sparrow Wallet
Desktop Bitcoin Wallet focused on security and privacy
Sparrow Wallet is an open-source, desktop-focused Bitcoin wallet designed for users who value complete control, security, and privacy when managing their Bitcoin funds. It provides a rich graphical interface that exposes Bitcoin’s underlying UTXO model rather than hiding it behind abstractions, helping users understand every input, output, and fee involved in transactions. Sparrow supports advanced workflows such as Partially Signed Bitcoin Transactions (PSBT), multisignature setups, customizable fee selection, and comprehensive coin control — making it suitable for power users, privacy advocates, and those running their own full nodes. It integrates with a wide range of hardware wallets (e.g., Ledger, Trezor, Coldcard) and connects to Bitcoin Core or Electrum servers, including via Tor for enhanced anonymity. -
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ta4j
A Java library for technical analysis
Ta4j is an open-source Java library for technical analysis. It provides the basic components for the creation, evaluation, and execution of trading strategies. Ta4j is available on Maven Central. You can also download example code from the maven central repository. The wiki is the best place to start learning about ta4j. For more detailed questions, please use the issues tracker. We can calculate indicators over this bar series, in order to forecast the direction of prices through the study of past market data. Then we have to build our trading strategy. It is made of two trading rules, one for entry, the other for exit. Ta4j comes with a set of basic trading rules/strategies which can be combined using boolean operators. Trading strategies can be easily compared according to a set of analysis criteria. Ta4j can also be used for live trading with more complicated strategies. -
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Block-chain for Academic Records
A prototype to digitally store, verify & authenticate academic records
This project aims to develop a prototype to digitally store, verify, and authenticate the academic documents using the permissioned distributed ledger of block chain technology. The prototype is a comprehensive system that uses IBM hyper ledger fabric to provide a transparent and trustable system with high level of integrity and security where all the stakeholders such as students, colleges, degree awarding Universities, regulatory authorities and employers can seamlessly participate in the verification process. -
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Cryptonose
An application tracking significant price changes on crypto markets
Cryptonose is a desktop application tracking significant price changes and giving an alerts for crypto markets in real-time. It's helpful if you are a daily trader and want to know instantly if something interesting is happening on your exchange. Cryptonose keeps real-time connection with supported exchanges (Binance, Bitfinex, Huobi, KuCoin and Poloniex, also a DEX: Uniswap V3 is supported). It gives instant notifications about a significant price changes, which is helpful in daily trading - you can react to a price change in seconds. It supports desktop notifications and can run web browser with cryptocurrency market for your exchange. -
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O3 wallet
This wallet was designed for everyday users, Simple and easy to use
O3 Wallet is java based Bitcoin Wallet software built on BitcoinJ. We are heavily focused on design and use cases. Note: We are not uploading new versions here. Follow our website for latest version!! -
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Besu Ethereum Client
An enterprise-grade Java-based, Apache 2.0 licensed Ethereum client
You can use Besu to develop enterprise applications requiring secure, high-performance transaction processing in a private network. A private network is a network not connected to Ethereum Mainnet or an Ethereum testnet. Private networks typically use a different chain ID and proof of authority consensus (QBFT, IBFT 2.0, or Clique). You can also create a local development network using proof of work (Ethash). Instructions for how to get started with developing on the Besu codebase. Please also read the wiki for more details on how to submit a pull request (PR). Besu is an Apache 2.0 licensed, MainNet compatible, Ethereum client written in Java. Participation in private networks is typically restricted in some way, so the volume of traffic is much lower than on Mainnet, resulting in lower system requirements. Depending on your environment and network setup, the minimum Java Virtual Machine (JVM) memory requirement for private networks is 4 GB. -
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BitcoinSuite
Bitcoin GUI in Java
BitcoinSuite is a Java based graphical user interface for Bitcoin, a peer-to-peer decentralized cryptocurrency. It is a direct fork of open source project NamecoinJ at http://sourceforge.net/p/namecoinj/. Donations are welcome: BTC: 1PqYXpLLSeAHz3FiZmPcfr451jnzsGgXbc, NMC: N2TFbwpTNhNLeXaBD8FSBbicb6guQNXUiA -
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Classpy
GUI tool for investigating Java class files
Classpy is a GUI tool for investigating Java class file, Lua binary chunk, Wasm binary code, and other binary file formats. Understands class files described by JVMS9. Supports Lua 5.3 binary chunk format. Supports Wasm binary format. Supports Bitcoin raw block and transaction format. Displays parsed binary file as tree and hex text. The corresponding hex text is highlighted when you select a tree node. This tool is mainly inspired by javap and JavaClassViewer. -
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Cryptocoins Blockchain Utilities
Utilities for accessing blockchains of various cryptocoins
Utilities for accessing blockchains of various cryptocoins. Java API for fetching data from Blockchains. -
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Jupiter Blockchain
Platform needed to run the Gravity framework for information storage
The Jupiter Project aims to make blockchain accessible and safe for everyone. Jupiter’s military-grade encryption helps ensure that user data is private and secure. Through our elite encryption capabilities, Jupiter can power secure dApps on public and private networks based on our client’s wishes. Our main product is our L1 blockchain, Jupiter. Jupiter is the base platform needed to run the Gravity framework for information storage and decentralized application building. Jupiter is built from Nxt's system based on cryptography and blockchain technology. On top of this platform, anyone can have assets, currencies, aliases, data, messaging, a DEX, and NFTs. Currently, our primary decentralized application is Metis, a decentralized messaging system that is double encrypted and requires no personally identifiable information (PII) to create an account. -
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Multifunctional Ethereum Wallet
This project is made to bring decentralization into daily life.
The Multifunctional Ethereum Wallet (MEW) is an Ethereum blockchain based decenttalized application (DAPP). It uses smart contracts on the Ethereum blockchain for executing transactions, bets, informations, codes, stc. The MEW is a Beta version, it's in testing phase, so it is available only on Ropsten, Infura network. However it is already capable to connect on the mainnet as well. The platform is designed to be a decentralized platform, which is available for everyone. It will have a lot of features, like marketplace, trading area, shop, sport betting, and other platforms in a single application where smart contracts and blockchain technology can give back the control in the hands of users. At this moment only the sport betting option is available. We need testers and advisors who can help our work. Development is in progress, we will add instructiond, details and videos continuosly. IF you have any question, please contact us. -
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NamecoinJ
Namecoin GUI in Java
NamecoinJ is a Java based graphical user interface for Namecoin, a peer-to-peer Domain Name System based on Bitcoin technology (a decentralized cryptocurrency). Donations are welcome: BTC: 19o81NGAHpBmVXkfUcxSttwnBsBnLK9hS3, NMC: Mx3hanF6qXywPAyrAU4S14CwXYcMnecaai -
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PUTinCoin
This is the REAL PutinCoin cryptocurrency project!
wave Hello! This is the REAL PutinCoin cryptocurrency project! We are developing a dedicated fan cryptocurrency for Russia, the PUTinCoin (PUT). Our coin shows the, that the blockchain connects people and does not seperate them and that cooperation is always better then separation. If you like to support, pls. write to admin@putincoin.org or contribute to the open repositories. eyes We are interested in Cryptocurrencies, Blockchain-Technology and Russia! revolving_hearts We're looking to collaborate on projects dedicated to Russia. mailbox How to reach us: admin@putincoin.org -
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WeIdentity is a set of distributed multi-center technical solutions that can carry the credible mapping of the actual identity and chain identity of the entity object (person or thing), as well as the realization of safe access authorization and data exchange between the entity objects. WeIdentity is independently developed and fully open source by the Microbank. It adheres to the concept of public alliance chains integrating resources, exchanging value, and serving the public. It is committed to becoming a distributed commercial infrastructure linking multiple vertical industry fields, promoting pan-industry, cross-institution, and cross-regional. Identity authentication and data cooperation. In the traditional way, user registration and identity management are completely dependent on the single center's registration agency; with the emergence of distributed ledger technology (such as blockchains), distributed multi-center identity registration, and identification.
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bitcoinj
A library for working with Bitcoin
bitcoinj is a library for working with the Bitcoin protocol. It can maintain a wallet, send/receive transactions without needing a local copy of Bitcoin Core and has many other advanced features. It's implemented in Java but can be used from any JVM compatible language, examples in Python and JavaScript are included. Highly optimized lightweight simplified payment verification (SPV) mode. In this mode, only a small part of the blockchain is downloaded, making bitcoin suitable for usage on constrained devices like smartphones or cheap virtual private servers. A wallet class with encryption, fee calculation, multi-signing, deterministic key derivation, pluggable coin selection/coin control, extensions support and event listeners that let you stay up to date with changes in your balance. Experimental full verification mode, which does the same verification work as Bitcoin Core. In this mode, the unspent transaction output set (UTXO set) is calculated. -
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brics
www.youtube.com/@Akhona_Kama
BRICS COIN is a decentralized cryptocurrency project designed to empower users in the BRICS nations (Brazil, Russia, India, China, and South Africa) by providing a secure, efficient, and accessible means of digital value transfer and financial inclusion. Built on the Ethereum blockchain as an ERC20 token, BRICS COIN aims to facilitate cross-border transactions, enhance economic collaboration, and foster innovation within the BRICS countries. Key Features Token Functionality: ERC20 Standard: Ensures compatibility with various wallets and decentralized applications (dApps). Minting and Burning: Allows for controlled supply management, enabling the creation of new tokens and the destruction (burning) of tokens to influence market dynamics. Decentralized Finance (DeFi) Functionality: Explore opportunities in DeFi, from staking to yield farming, helping users to earn rewards on their holdings. Community Governance: Empower the BRICS community by enabling token holders to p -
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chaOS41
A cryptocurrency like Bitcoin improved upon with reality binding.
There is a reason this project holds no code. chaOS41 is a cryptocurrency with reality binding. A given value of money was paid for a surface area the size of a flower pot. It was out of proportion. The chaoOS41 currency corrects that. It binds its value to reality. Its unit value is a ratio between money and land area.. When that ratio normalizes, the currency becomes available to the public. 1 more developer is wanted. For that you need inside access, which means the access protocol is made public now. It is also the open-source cryptographic protocol. Type in a formatted string as "beacon" and a number. Repeat. When the identical string is produced, prepare. When the identical string repeats, a name is added. This signals that the next line of text you type, is registered. Hint: include a URL.End of protocol. Valid beacon digits are 250, 1024, 2048, 4096, 8192, 16384, 32768 and up. -
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exchange-core
Ultra-fast matching engine written in Java based on LMAX Disruptor
Exchange-core is an open-source market exchange core based on LMAX Disruptor, Eclipse Collections (ex. Goldman Sachs GS Collections), Real Logic Agrona, OpenHFT Chronicle-Wire, LZ4 Java, and Adaptive Radix Trees. Designed for high scalability and pauseless 24/7 operation under high-load conditions and providing low-latency responses. Single order book configuration is capable to process 5M operations per second on 10-years old hardware (Intel® Xeon® X5690) with moderate latency degradation. HFT optimized. Priority is a limit-order-move operation mean latency (currently ~0.5µs). Cancel operation takes ~0.7µs, placing new order ~1.0µs. Disk journaling and journal replay support, state snapshots (serialization) and restore operations, LZ4 compression. Lock-free and contention-free order matching and risk control algorithms. Matching engine and risk control operations are atomic and deterministic.
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