Developer website: Hamster Republic Productions
One day, Norwegian fishermen Birger and Roald are returning home from a long day of fishing, when they spotted a herd of adorable fat fuzzy lemmings stampeding off a cliff into the ocean (as they are known to sometimes do). Overwelmed with pity and mindless altrusim, they land their boat on the beach, take up a net, and try to save as many helpless lemmings as possible.
GPL license. See homepage for source code