Limbo - “Dark, disturbing, yet eerily beautiful, Limbo is a world that deserves to be explored.” Joystiq. “Limbo is as close to perfect at what it does as a game can get.” Destructoid. Buy LIMBO: Special Edition.
Flappy Bird Online - Play the Original Flappy Bird Game Online.
Botanicula - Botanicula is a point-and-click adventure game developed by Amanita Design.
Flying 2048 - Flying 2048... quite possibly the most "addicting" game in the world.
Contrast - A macOS app for quick access to WCAG color contrast ratios
Flappux - HTML based clone of Flappy Birds that is unapologetically free software.