In my spare time I volunteer to Royal Free Radio, which is a Hospital Radio in North London. I do not present a show, but I have implemented and currently administer their play-out software and servers.
I have helped Royal Free Radio set up an online streaming service to expand their reach past the hospital. This process is covered in a blog entry here.
I have also written the website from scratch since I was about 14, using this site to help develop my coding skills.