F/OSS
I try to support the amazing free and open source software that I use every day: Debian (@aerusso-guest), SageMath, and others on GitHub.
This website is written by hand, served by nginx from a VPS I maintain, using a CDN. Eventually I'll write a tutorial discussing how I did this for other people interested in maintaining their own websites.
I have adopted kcollectd, a graphical front-end to the collectd monitoring suite.