I have now published my first open source Scala application, WhenDone. It's a todo application primarily for a single user. Goals are that it's easy to add a task, and easy to find a task do to. It's in its early phase, but is usable. I mainly develop this for my own needs, but it's a general app, so others might find it useful too. The most interesting thing might be that it is command based, even though it uses Swing! How perverted is that :).
Here's two screen captures from an example session:
Example session, part 1
Example session, part 2
WhenDone is under the MIT lisence. More information and downloadable content can be found at Google Code: WhenDone's project page.