Most of my work as a software developer is for the better of humanity - which i'm lucky to do, but straight out of university it was my goal. I started a wee company that delivers stroke, dementia, autism therapies and we'll be branching out to our own products. Interestingly, I had a similar idea drawn up for Hollieguard - looks like I may not have to build it now.
If you're interested in any work, message me.