Jease uses a Subversion-Repository hosted by Google Code:

http://jease.googlecode.com/svn/trunk/

If you want to browse the repository, you can use the source browser at Google Code:

http://code.google.com/p/jease/source/browse/

The binary-release comes with sources included, so there's no need to check out the sources from subversion and build Jease from scratch as long as you don't want to live on the bleeding edge.

If you want to track the progress of the project, you can view all commit-logs and bug-reports via a dedicated GoogleGroup:

http://groups.google.com/group/jease-dev