The J2DGAMEFRAMEWORK provides the necessary classes to implement a simple 2D game in a window enviroment using Java Swing libraries. This framework also provides a Sprite Collision Manager and a simple GUI template. By using this framework, the developers only concern is how to implement classes, and not the 2D World, the collisions, etc. It uses the Observer Design Pattern. It has double-buffered rendering, simple use of collisions, and user-transparent multi-threading for collision classes. You can move sprites like a vector with speed and angle, and simply save and load your game.
JSimLife is an advanced biological life simulation. In JSimLife, every life form is a cell. Every cell is a Sprite and it has a Brain and a Dna object. Every Cell's aspects are stored in a Dna (Dna is a Vector of parameters). Cells are able to reproduce themselves using methods provides by the Dna class. The user can change the Simulation Parameter, create new DNA, create new types of cells, and save or load simulations and DNA.
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.