I was maybe thinking of adding a database information dialog, showing different statistics about the database (just because I can). It would be nice to plot some things, so any opinions on adding a chart library and in that case which?

http://www.jfree.org/jfreechart/ seems to be the most competent, but then it is rather large and also supports lots of things which is not of primary interest.

https://github.com/eseifert/gral seems more suitable in many ways, but no Maven support (yet).