this is a simple involute spur gear designer. the gears are designed with zero play. since i use the program to generate gears for laser cutting this is no problem because the beam width introduces a certain play.

requirements:
.net version 4.0

release history:
v0.2
– file error handling minor bug fixes

v0.1
– first beta release

disclaimer:
the program comes as is with no warranty whatsoever. therefore use it at your own risk! in case you find an error you can drop me a line nonetheless.

you can download the file from here:
involute spur gear designer v0.2

screenshot: