Games
Votes: 94
Clone of Transport Tycoon Deluxe
OpenTTD is an open source clone of the Microprose game Transport Tycoon Deluxe (TTD).
As president of a start-up transportation company in 1950, you have a choice of building rail, road, air and maritime transportation routes to build up your transportation empire. Outsmart your competition by beating them to attractive passenger and commodities routes to become the game's highest-ranking transport company by the year 2050.
Votes: 3
PokerTH is an open source Texas hold'em simulator.
The game is faithful to the Texas Hold'em rules and betting system. PokerTH allows for up to ten human players, with computer-controlled players filling in if there are not enough humans. Players can also play against other PokerTH users online.

Votes: 22
Frogatto & Friends jump-and-run game
Frogatto is a "platformer" or "jump-and-run" videogame. Like many older arcade/nintendo/sega titles, the world is viewed as a cross-section seen from the side, and your character walks and jumps between solid platforms, whilst avoiding being hurt by monsters. We're not a clone of any specific game; although just by being a platformer, it's impossible not to have something in common with games like mario or sonic. So we are trying to innovate a bit. Frogatto is also the protagonist's name. It's eponymous.