Free, local, open-source AI app builder ✨ v0 / lovable / Bolt alternative 🌟 Star if you like it!
🕸️ Web apps in pure Python 🐍
Solidity, the Smart Contract Programming Language
This open-source curriculum introduces the fundamentals of Model Context Protocol (MCP) through real-world, cross-language examples in .NET, Java, TypeScript, JavaScript, and Python. Designed for developers, it focuses on practical techniques for building modular, scalable, and secure AI workflows from session setup to service orchestration.
Sim is an open-source AI agent workflow builder. Sim Studio's interface is a lightweight, intuitive way to quickly build and deploy LLMs that connect with your favorite tools.
A local-first personal finance app
A library for building applications in a consistent and understandable way, with composition, testing, and ergonomics in mind.
A collective list of free APIs
World's fastest and most advanced password recovery utility
Recommend new arxiv papers of your interest daily according to your Zotero libarary.
A hex editor for WeChat/QQ/TIM - PC版微信/QQ/TIM防撤回补丁（我已经看到了，撤回也没用了）
The easiest way to run WireGuard VPN + Web-based Admin UI.
Transcribe on your own!
Design patterns implemented in Java
🔥 人人可用的开源 BI 工具，数据可视化神器。An open-source BI tool alternative to Tableau.
1️⃣🐝🏎️ The One Billion Row Challenge -- A fun exploration of how quickly 1B rows from a text file can be aggregated with Java
RuoYi AI 是一个全栈式 AI 开发平台，旨在帮助开发者快速构建和部署个性化的 AI 应用。
The most advanced ORM of JVM, for both java & kotlin
Awesome LeetCode resources to learn Data Structures and Algorithms and prepare for Coding Interviews.
The world's fastest open query engine for sub-second analytics both on and off the data lakehouse. With the flexibility to support nearly any scenario, StarRocks provides best-in-class performance for multi-dimensional analytics, real-time analytics, and ad-hoc queries. A Linux Foundation project.
Apache Iceberg
Apache Cassandra®
A browser automation framework and ecosystem.
ANTLR (ANother Tool for Language Recognition) is a powerful parser generator for reading, processing, executing, or translating structured text or binary files.
Agentic AI Framework for Java Developers
A Simple android remote administration tool using sockets. It uses java on the client side and python on the server side
Telegram for Android source
📱 Nextcloud Android app
C7 CE enters EOL in October 2025. Please check out C8 https://github.com/camunda/camunda – Flexible framework for workflow and decision automation with BPMN and DMN. Integration with Quarkus, Spring, Spring Boot, CDI.
强大易用的开源建站工具。
Apollo is a reliable configuration management system suitable for microservice configuration management scenarios.
A collection of algorithms and data structures
JDK main-line development https://openjdk.org/projects/jdk
SuperSonic is the next-generation AI+BI platform that unifies Chat BI (powered by LLM) and Headless BI (powered by semantic layer) paradigms.
👶🏻 신입 개발자 전공 지식 & 기술 면접 백과사전 📖
Apache Paimon is a lake format that enables building a Realtime Lakehouse Architecture with Flink and Spark for both streaming and batch operations.
Apache Spark - A unified analytics engine for large-scale data processing
sbt, the interactive build tool
♞ lichess.org: the forever free, adless and open source chess server ♞
The Scala 3 compiler, also known as Dotty.
Modern Load Testing as Code
Scala language server with rich IDE features 🚀
Gluten is a middle layer responsible for offloading JVM-based SQL engines' execution to native engines.
A Git platform powered by Scala with easy installation, high extensibility & GitHub API compatibility
Open-source high-performance RISC-V processor
An Agile RISC-V SoC Design Framework with in-order cores, out-of-order cores, accelerators, and more
Spark: The Definitive Guide's Code Repository
An open-source storage framework that enables building a Lakehouse architecture with compute engines including Spark, PrestoDB, Flink, Trino, and Hive and APIs
Deequ is a library built on top of Apache Spark for defining "unit tests for data", which measure data quality in large datasets.
State of the Art Natural Language Processing
An open protocol for secure data sharing
A platform to build and run apps that are elastic, agile, and resilient. SDK, libraries, and hosted environments.
Scala 2 compiler and standard library. Scala 2 bugs at https://github.com/scala/bug; Scala 3 at https://github.com/scala/scala3
The Community Maintained High Velocity Web Framework For Java and Scala.
Code formatter for Scala
Rocket Chip Generator
RISC-V Torture Test
A V2Ray client for Android, support Xray core and v2fly core
Android feed reader app
A powerful and extensible multiplatform chart library.
Bringing Astrid Tasks back from the dead
🌍 免 Root 的 SIM 卡国家码修改工具 | 解决国际漫游时的兼容性问题，帮助使用海外 SIM 卡获得更好的本地化体验，解锁运营商限制，突破区域限制
Free and open source manga reader for Android
翻墙-科学上网
A private messenger for Android.
Manga reader for Android
Official Jetpack Compose samples.
Fcitx5 input method framework and engines ported to Android
Legado 3.0 Book Reader with powerful controls & full functions❤️阅读3.0, 阅读是一款可以自定义来源阅读网络内容的工具，为广大网络文学爱好者提供一种方便、快捷舒适的试读体验。
Source code of extensions in https://github.com/keiyoushi/extensions
WordPress for Android
Using system APIs directly with adb/root privileges from normal apps through a Java process started with app_process.
A novel Android app store focused on security, privacy, and usability
DAVx⁵ is an open-source CalDAV/CardDAV suite and sync app for Android. You can also access your online files (WebDAV) with it.
Multiplatform AWS SDK for Kotlin
An app to view libraries used in apps in your device.
Kotlin Language Server and plugin for Visual Studio Code
An app for manga and anime
A library for building applications in a consistent and understandable way, with composition, testing, and ergonomics in mind.
Powerful menu bar manager for macOS
Generate Swift client and server code from an OpenAPI document.
The modern video player for macOS.
Virtual machines for iOS and macOS
Reactive Programming in Swift
Async Algorithms for Swift
A lightweight, pure-Swift library for downloading and caching images from the web.
In-app purchases and subscriptions made easy. Support for iOS, watchOS, tvOS, macOS, and visionOS.
SwiftUI sample app using Clean Architecture. Examples of working with SwiftData persistence, networking, dependency injection, unit testing, and more.
On-device Speech Recognition for Apple Silicon
An open-source userscript manager for Safari
A modern approach to Container-Based Dependency Injection for Swift and SwiftUI.
Low-level system calls and types for Swift
📸 A powerful, high-performance React Native Camera library.
📱 A strongly-typed, caching GraphQL client for iOS, written in Swift.
FSPagerView is an elegant Screen Slide Library. It is extremely helpful for making Banner View、Product Show、Welcome/Guide Pages、Screen/ViewController Sliders.
💧 A server-side Swift HTTP web framework.
A Swift client for Supabase. Query your Supabase database, subscribe to realtime events, upload and download files, browse Swift examples, invoke postgres functions via rpc, invoke supabase edge functions, query pgvector.
A <Video /> component for react-native
A handy collection of more than 500 native Swift extensions to boost your productivity.
🕸️ Web apps in pure Python 🐍
This open-source curriculum introduces the fundamentals of Model Context Protocol (MCP) through real-world, cross-language examples in .NET, Java, TypeScript, JavaScript, and Python. Designed for developers, it focuses on practical techniques for building modular, scalable, and secure AI workflows from session setup to service orchestration.
A collective list of free APIs
Recommend new arxiv papers of your interest daily according to your Zotero libarary.
A system for agentic LLM-powered data processing and ETL
Run all your local AI together in one package - Ollama, Supabase, n8n, Open WebUI, and more!
A collection of sample agents built with Agent Development (ADK)
Set up a personal VPN in the cloud
verl: Volcano Engine Reinforcement Learning for LLMs
The LLM Evaluation Framework
The official Python SDK for Model Context Protocol servers and clients
An Open Source Python alternative to NotebookLM's podcast feature: Transforming Multimodal Content into Captivating Multilingual Audio Conversations with GenAI
Inspect: A framework for large language model evaluations
Python packaging and dependency management made easy
The HTML Presentation Framework
Xray panel supporting multi-protocol multi-user expire day & traffic & IP limit (Vmess & Vless & Trojan & ShadowSocks & Wireguard)
JavaScript animation engine
Independent technology for modern publishing, memberships, subscriptions and newsletters.
Quasar Framework - Build high-performance VueJS user interfaces in record time
📝 Algorithms and data structures implemented in JavaScript with explanations and links to further readings
24 Lessons, 12 Weeks, Get Started as a Web Developer
Opensource IDE For Exploring and Testing API's (lightweight alternative to Postman/Insomnia)
The iconic SVG, font, and CSS toolkit
Low-code platform for building business applications. Connect to databases, cloud storages, GraphQL, API endpoints, Airtable, Google sheets, OpenAI, etc and build apps using drag and drop application builder. Built using JavaScript/TypeScript. 🚀
An AI-powered task-management system you can drop into Cursor, Lovable, Windsurf, Roo, and others.
An advanced crypto trading bot written in Python
Free, local, open-source AI app builder ✨ v0 / lovable / Bolt alternative 🌟 Star if you like it!
Sim is an open-source AI agent workflow builder. Sim Studio's interface is a lightweight, intuitive way to quickly build and deploy LLMs that connect with your favorite tools.
A local-first personal finance app
The easiest way to run WireGuard VPN + Web-based Admin UI.
Transcribe on your own!
BISHENG is an open LLM devops platform for next generation Enterprise AI applications. Powerful and comprehensive features include: GenAI workflow, RAG, Agent, Unified model management, Evaluation, SFT, Dataset Management, Enterprise-level System Management, Observability and more.
Modern Backend Framework that unifies APIs, background jobs, workflows, and AI agents into a single cohesive system with built-in observability and state management.
Open-source Visual programming for backend logic that integrates with existing codebases. Flyde bridges the gap between technical and non-technical team members. Product managers, designers, and backend developers can collaborate on the same visual flows.
开源白板工具（SaaS），一体化白板，包含思维导图、流程图、自由画等。All in one open-source whiteboard tool with mind, flowchart, freehand and etc.
Joplin - the privacy-focused note taking app with sync capabilities for Windows, macOS, Linux, Android and iOS.
Amazon Q, CodeCatalyst, Local Lambda debug, SAM/CFN syntax, ECS Terminal, AWS resources
Open Source version of Cluely
Apache Superset is a Data Visualization and Data Exploration Platform
Build production-ready applications in TypeScript
Open Source Alternative to NotebookLM / Perplexity, connected to external sources such as Search Engines, Slack, Linear, Jira, ClickUp, Confluence, Notion, YouTube, GitHub, Discord and more. Join our discord: https://discord.gg/ejRNvftDp9
A node.js version management utility for Windows. Ironically written in Go.
screen sharing for developers https://screego.net/
An HTTP toolkit for security research.
"rsync for cloud storage" - Google Drive, S3, Dropbox, Backblaze B2, One Drive, Swift, Hubic, Wasabi, Google Cloud Storage, Azure Blob, Azure Files, Yandex Files
Distributed reliable key-value store for the most critical data of a distributed system
Contrib repository for the OpenTelemetry Collector
Xray, Penetrates Everything. Also the best v2ray-core. Where the magic happens. An open platform for various uses.
Nomad is an easy-to-use, flexible, and performant workload orchestrator that can deploy a mix of microservice, batch, containerized, and non-containerized applications. Nomad is easy to operate and scale and has native Consul and Vault integrations.
Terragrunt is a flexible orchestration tool that allows Infrastructure as Code written in OpenTofu/Terraform to scale.
Redis Go client
Lightweight server monitoring hub with historical data, docker stats, and alerts.
simple terminal UI for git commands
Define and run multi-container applications with Docker
Database migrations. CLI and Golang library.
Open Policy Agent (OPA) is an open source, general-purpose policy engine.
Staging repo for development of native port of TypeScript
Fast key-value DB in Go.
MCP Toolbox for Databases is an open source MCP server for databases.
Run Kubernetes locally
Lightweight Kubernetes
The user-friendly command line shell.
🚀 10x easier, 🚀 140x lower storage cost, 🚀 high performance, 🚀 petabyte scale - Elasticsearch/Splunk/Datadog alternative for 🚀 (logs, metrics, traces, RUM, Error tracking, Session replay).
A simple, decentralized mesh VPN with WireGuard support.
📊 Cube’s universal semantic layer platform is the next evolution of OLAP technology for AI, BI, spreadsheets, and embedded analytics
Scalable datastore for metrics, events, and real-time analytics
🚀 High-performance distributed object storage for MinIO alternative.
Self-hosted AI coding assistant
A scalable file analysis and data generation platform that allows users to easily orchestrate arbitrary docker/vm/shell tools at scale.
A Datacenter Scale Distributed Inference Serving Framework
A library for building fast, reliable and evolvable network services.
Modern columnar data format for ML and LLMs implemented in Rust. Convert from parquet in 2 lines of code for 100x faster random access, vector index, and data versioning. Compatible with Pandas, DuckDB, Polars, Pyarrow, and PyTorch with more integrations coming..
The Fully Customizable Desktop Environment for Windows 10/11.
WebAssembly System Interface
Free, open source, a high frequency trading and market making backtesting and trading bot, which accounts for limit orders, queue positions, and latencies, utilizing full tick data for trades and order books(Level-2 and Level-3), with real-world crypto trading examples for Binance and Bybit
Build system optimized for JavaScript and TypeScript, written in Rust
Anki is a smart spaced repetition flashcard program
A smarter cd command. Supports all major shells.
TensorZero is an open-source stack for industrial-grade LLM applications. It unifies an LLM gateway, observability, optimization, evaluation, and experimentation.
Boa is an embeddable Javascript engine written in Rust.
A new type of shell
A blazingly fast, open-source application server with type-safe APIs, built-in JS/ES6/TS runtime, realtime, auth, and admin UI built on Rust, SQLite & V8.
Dataframes powered by a multithreaded, vectorized query engine, written in Rust