Box2D - A 2D Physics Engine for Games
Letter to Yourself - Send a physical letter to your future self
Havok - Colorado Thrash Metal - New Website Coming Soon
Future Me - Send an email to your future self
Bullet - Share captioned video snippets of podcasts from any app
Letter to my future self - Letter to my future self is a prominent email scheduling service that gives you the opportunity to create a letter with goals and thoughts for your future self and schedule a date for sending it.