I've spent 20 years giving away software of one sort or another — which was generally a lot more fun than selling it :-)
In recent years projects I've founded have been used by organisations as diverse as the BBC (for their 2012 Olympics website), the Health Protection Agency (for research into producing vaccines more quickly), or the NHS (for analysing patient records).
- Makers, by Cory Doctorow [science fiction]
- Makers [yes, same title!], by Chris Anderson [non-fiction]
- From Zero to Maker by David Lang [non-fiction]