chess4j is a simple chess engine written using Java based technologies. It is meant to be a test bed for various interests, including parallel and distributed programming techniques.
chess4j is hosted on SourceForge.
Visit https://sourceforge.net/projects/chess4j/ to download the latest version, read the documentation, or get the source code.
Follow the development of chess4j on my personal blog, under the 'chess4j' category at http://www.jamesswafford.com/category/chess4j/.