Top JAVA GitHub Repositories & Tools (2026)

Tiny fast HTML5 game engine with many features and no dependencies.

A build system and monorepo management tool for the web ecosystem, written in Rust.

The Apache Tika toolkit detects and extracts metadata and text from over a thousand different file types (such as PPT, XLS, and PDF).

🔮 An easy-to-use JavaScript unit testing framework.

Java libraries for writing microservices

OpenAPI based HTTP Client code generator

Portable AI agent runtime for the JVM. One @Agent class runs on Spring AI, LangChain4j, Anthropic, or 9 more behind one SPI. Token streaming, tool calls, human approvals, and governance over WebSocket, SSE, gRPC, or WebTransport/HTTP3. Speaks MCP, A2A, and AG-UI.

:clock8: The original jQuery plugin that makes it easy to support automatically updating fuzzy timestamps (e.g. "4 minutes ago").

High performance non-blocking webserver

A fast, lightweight and more productive microservices framework

VTable is not just a high-performance multidimensional data analysis table, but also a grid artist that creates art between rows and columns.

Framework for Evolutionary Message-Driven Microservices on the JVM

Apache Lucene open-source search software

Apache Maven Daemon

⚙️ The static code analysis tool you need for your HTML

Apache Avro is a data serialization system.

Apache Nutch is an extensible and scalable web crawler

jQuery Terminal Emulator - JavaScript library for creating web-based terminals with custom commands

WordPress for Android

Mirror of Apache PDFBox