Some free tools for fitness activities:
Here are some computer-related projects I've worked on:
This is a link to my Github account. If you want to take a closer look at any of my programming projects, this is where I publish things that might be worth sharing.
If you're interested in running a web app, you should consider using one of the BSDs. Here are many of the steps I take when setting up a FreeBSD server for a web app. Last updated in 2014.