Kafka GUI for Apache Kafka to manage topics, topics data, etc.
Now continued as OculiX — see oculix.org
Java Concurrency Tools for the JVM
A blazing fast multi-language serialization framework
Java library that enables cross-platform access to popular native APIs
Fast, scalable, multi-language and extensible build system
Java implementation of RSocket
The open source BIMserver platform
Apache Drill is a distributed MPP query layer for self describing data
Arianne is an engine to develop multiplayer online games like Stendhal
Translate files between XLS / XLSX and XML format . . .
An extremely fast implementation of Aho Corasick algorithm
The scalable open source tool for lean and agile project management
Task Scheduler for Java, Groovy, Javascript, python & ruby
giServer the easy to use and extensible batch and integration server
The new multi-platform text editor with syntax highlighting
A tool can debug and profile javascript in multi mobile browsers