Pingus is a classic 2D puzzle game in which you have to guide a group of penguins through dangerous levels to reach an exit. You can accomplish this by assigning different actions to each penguins such as “build a bridge”, “dig a hole” or “redirect other penguins”. Pingus is Free Software and available for Linux, Windows and MacOSX
It was started at the end of 1998 with the simple goal to create a Free (as in freedom, not as in free beer) Lemmings-tm clone. The Free means you get the sources and are allowed and encouraged to change and distribute them. You basically get everything that was used to create this game. In the years it has grown than quite a bit over the original goal and become something more than just a clone, it has original artwork, a built-in level editor, new actions, multiplayer and a few other features.