Unity - The multiplatform game creation tools for everyone.
Tweet Photo - Automagically post your Instagram photos to Twitter ✨
Godot Engine - Feature-packed 2D and 3D open source game engine.
Twiger - Share tweets on Instagram
Blender - Blender is the open source, cross platform suite of tools for 3D creation.
Tweetlet - Tweetlet is a free tool that lets you create beautiful images from your tweets, text, and any other images in a snap.