Event correlation engine with reactive facilities
Java 2D graphics/utility library
A pure PL/SQL reporting engine (transforms jrxml to PDF)
Simple Java Web Browser
wiki engine for small teams
Lightweight extensible wiki engine
Wiki .net is a simple and open source wiki engine running on Asp.Net
A Wargame
Pye - Javascript Engine For Drawing Fast, Fluid and Dynamic Pie Charts
A very easy all-round template for everyone
High performance workflow with strong support for parallel tasks
A CBLS Engine in SCALA, NOW part of OscaR
Bot for 0ad game in Haxe, this is no longer maintained
Make games with Lego-like building blocks
Wiki engine with implicit internal links