MEWER 0.6
The sixth public test of MEWER (MEWsician's Exercises for Rhythms) is online. This one has two difficulty levels, warns users if they didn't indicate the correct number of notes, and has misc bug fixes. Try it here: MEWER 0.6.
MEWER has also been added as a Google Code project; you can get the source code or add Issues (bugs or planned features) at http://code.google.com/p/mewer.