jchart2d is a real-time charting library written in java.
Immutable/Persistent Collections Library
Android common lib, ImageCache, HttpCache, DropDownListView, etc.
Free Java components for Quantitative Finance and Algorithmic Trading
Central Software Configuration by Java API and SOAP Service
Library tools to collect timing in Java, C, C++
The Java text processor.
Fiter the java collection using SQL syntax
A neural network library for Java.