The clever independent developers behind the first two Humble Indie Bundles have just kicked off a third charity drive focused on Frozenbyte, the Finnish team behind Trine. As with previous bundles, the Humble Frozenbyte Bundle contains five DRM-free casual games, including Trine, Shadowgrounds, Shadowgrounds: Survivor, Splot and Jack Claw. However, it's worth noting that only Trine and the two Shadowgrounds titles are ready for action on Windows, Mac and Linux.

Splot is still in development and you're only preordering the game, which is described as a "modern-era fairytale in playable form." We haven't seen a definitive release date. Meanwhile, Jack Claw is an incomplete prototype that Frozenbyte scrapped. The game is playable, but it's probably a little rough around the edges and it requires an Xbox 360 controller. Frozenbyte is also including Jack Claw's unfinished source, which might entertain the seasoned coders among us.

As with previous Humble Indie Bundles, you can split any desired sum between the developers, the Humble organizers, the Electronic Frontier Foundation and Child's Play. We encourage you to send at least a buck or two as a penny will just cost the event transaction fees. As of writing, more than 44,000 people have donated over $228,000. The top donation is $1,024. On average, Windows users sent $4.14, Mac users contributed $6.27, while Linux users have given $12.00.