There are a growing number of stand alone support modules in my projects that I need to publish as a collection some day. Here's a couple links to some of them:
- https://github.com/WickedSmoke/faun/tree/master/support
- https://github.com/xu4-engine/u4/tree/master/src/support
These include more exotic stuff like a grid based field-of-view calculation and a version of the sfxr synthesizer.