I keep an eye on Game Giveaway of the Day because although I don't tend to download most of their offerings, every once in awhile they have a neat piece of software that I grab.
Today it's Tiny Worlds. It's a neat little logic game in the vein of Lemmings where you are given some cute animals (sheep, fish, chicks) and have to guide them home past obstacles and predators.
I'm going to keep ahold of this one and stick it in my bag of logic activities.
NOTE: As always with Giveaway of the Day stuff you can only download and install this today. It won't be availible tommorrow and if you download it but don't install it you won't be able to install it after today.