Journal - Organize all your ideas
Box2D - A 2D Physics Engine for Games
Journalistic - A simple, yet powerful micro journaling app
Bullet - Share captioned video snippets of podcasts from any app
Journaly - The customisable journal app
Matali Physics - Matali Physics is an advanced, multi-platform, high-performance 3d physics engine intended for games, virtual reality and physics-based simulations.