PUBLIC MARKS with tags engine & library

I wrote a Rails engine which provides applications with complete documentation library functionality by simplying adding a gem. Documentation is a Rails engine which provides a complete system for managing a set of hierarchical documentation. Once installed in an application, you'll have a complete user interface for viewing as well as editing a set of markdown pages.

Simple busines workflow engine. You can code own business jobs (workflow steps), and embed it to workflow engine. Big advatage is that you change workflow you don't need to recode anything - only change configuration of workflow.

A physics Engine which focus on Soft body animation

Anoher $100 open source game engine which similiar to Torque Engine. Pretty impressive engine

A famous open source 3D Engine

XEngine Project Homepage

APOCALYX is a 3D engine written in C++ that uses the OpenGL API, OpenAL, Lua and other open source libraries.

Omega Collision Engine

PathEngine is an AI pathing finding middleware for path finding