Well just a raytracer in Visual basic 6, thus the name VB6 raytracer. Not because it is easy or logical, but because it is hard. I know this is not the right language to write a raytracer, see it as a stubborn POC that it is still somehow possible.
An editor for the open source game c-evo (http://www.c-evo.org). A suite of several different editors (unit graphics, tile graphics, nation files) with some interoperability. It is written in C# 3.5 using Visual Studio 2010.