Free and Open Source, Distributed, RESTful Search Engine

ZXing ("Zebra Crossing") barcode scanning library for Java, Android

Logstash - transport and process your logs, events, or other data

Realm is a mobile database: a replacement for SQLite & ORMs

Web-based notebook that enables data-driven, interactive data analytics and collaborative documents with SQL, Scala and more.

LIBSVM -- A Library for Support Vector Machines

Hackpad is a web-based realtime wiki.

A cool search view animation library

A high performance replicated log service. (The development is moved to Apache Incubator)

Read Eval Print Loop for Java

SonarLint for Eclipse

The core engine of VanillaDB

Combinatorial objects stream generators for Java.