SVNKit
SVNKit brings Subversion closer to the Java world! SVNKit is a pure Java toolkit - it implements all Subversion features and provides APIs to work with Subversion working copies, access and manipulate Subversion repositories - everything within your Java application.
 Java GIT
Java GIT/Eclipse GIT (by Shawn Pearce) is a Java GIT library and plugin for Eclipse IDE.
Data Sharing
Data sharing and versioning using existing technologies and tools.
Git, Mercurial, Bazaar
/livcos.org/data/map/brainstorm/DataSharing