Avoision is a very simple arcade-style game. There's no story, no fancy graphics, no campaigns--just frantic, high-speed gameplay. Gameplay consists of moving a green block around with the arrow keys. The goal is to capture the red block before the timer runs out to score points. You must avoid all the white blocks that appear as you progress through the game.
RoboBrain SDK is a simple, lightweight 2D game engine for Android phones and tablets. It supports OpenGL ES 1.0 Rendering, a custom GameActivity class, a World/Entity system, basic physics and collision detection, animated and static sprites, and support for Multitouch and accelerometer input.
Tree Layout Helper is a .NET/Mono library that provides some utilities for handling tree structures. Most importantly, it supports the display of tree structures as two-dimensional graphics. By using ready-made interfaces, you can specify the size of your nodes, and the Tree Layout Helper library will take care of placing those nodes appropriately.