Free and Open Source, Distributed, RESTful Search Engine

Dex to Java decompiler

An image loading and caching library for Android focused on smooth scrolling

A distributed task scheduling framework.（分布式任务调度平台XXL-JOB）

a fast, scalable, multi-language and extensible build system

Desktop/Android/HTML5/iOS Java game development framework

ANTLR (ANother Tool for Language Recognition) is a powerful parser generator for reading, processing, executing, or translating structured text or binary files.

Ip2region is an offline IP address manager framework and locator with both IPv4 and IPv6 supported, supporting billions of data segments, ten microsecond searching performance, xdb search client fo…

Apache Pulsar - distributed pub-sub messaging system

Tink is a multi-language, cross-platform, open source library that provides cryptographic APIs that are secure, easy to use correctly, and hard(er) to misuse.

Stetho is a debug bridge for Android applications, enabling the powerful Chrome Developer Tools and much more.

Matrix is a plugin style, non-invasive APM system developed by WeChat.

OpenRefine is a free, open source power tool for working with messy data and improving it

CoreNLP: A Java suite of core NLP tools for tokenization, sentence segmentation, NER, parsing, coreference, sentiment analysis, etc.

Android filters based on OpenGL (idea from GPUImage for iOS)

A Flexible and Powerful Parameter Server for large-scale machine learning

A fast ImageView that supports rounded corners, ovals, and circles.

Gephi - The Open Graph Viz Platform

A Java to iOS Objective-C translation tool and runtime.

The Physical Web: walk up and use anything

Deep Learning (Python, C, C++, Java, Scala, Go)

Compiles Java bytecode to JavaScript, WebAssembly and C

Anthelion is a plugin for Apache Nutch to crawl semantic annotations within HTML pages.

Extracts Exif, IPTC, XMP, ICC and other metadata from image, video and audio files

Apache BookKeeper - a scalable, fault tolerant and low latency storage service optimized for append-only workloads

A Graph Traversal Language (no longer active - see Apache TinkerPop)

An easy-to-learn/use static analysis framework for Java

c:geo - The powerful Android geocaching app.

Open scientific N-dimensional image processing 🔬 🎇

A Processing/Java library for high performance GPU-Computing (GLSL). Fluid Simulation + SoftBody Dynamics + Optical Flow + Rendering + Image Processing + Particle Systems + Physics +...