DrPetter (creator of sfxr) had recently updated his music editing tool musagi with a number of new features and bug fixes. An OpenGL paint application called protoshop was also released to the public, which should be receiving regular updates in the coming weeks.

Developers looking for a freeware game development tool might want to take a look at Construct. There are a few examples to download which demonstrates the engine's basic features in action, and a showcase section in the forums where members would regularly post their creations to.

Construct still has some ways to go before achieving the popularity or versatility of Game Maker and MMF (lack of comprehensive tutorials isn't helping), but what's already available so far does show promise.