JCT draws and edits thematic maps in Java. It is primarily intended to geography teachers and their pupils. It is localized in French and English. You can see some screenshots on http://jct.sf.nst/.
JCT is a simple thematic maping software. Version 1.0 will be released between July 5th and July 10th. Until then, you can see what it will look like on http://jct.sf.net/.