Flying 2048 - Flying 2048... quite possibly the most "addicting" game in the world.
Flappux - HTML based clone of Flappy Birds that is unapologetically free software.
Need for Feed - Need for Feed is a wonderful skill based game where you help a bird eat as much food as possible.
Sakura Fly - Sakura Fly is an open-source game similar to Flappy Bird where you fly a paper plane and collect...
Flappy Bird Online - Play the Original Flappy Bird Game Online.
Floculus Bird - Floculus Bird is a remake of Flappy Bird in 3D with Oculus Rift support. I made it in about five hours for Flappy Jam, a game jam organized by the indie community to show support for Dong Nguyen.