On November 11, 2014 Mozilla announced the Polaris Privacy Initiative. One key part of the initiative is us supporting the tor network by deploying tor middle relay nodes. On January 15, 2015 our first proof of concept (POC) went live.
TL;DR; here are our tor relays: https://globe.torproject.org/#/search/query=mozilla
I assume you already know about TOR, The Onion Router for anonymity to protect your privacy.
TOR is a network so it can only work if there are nodes (relays). If you have a server, you can run one so consider it. Afraid of legal issues? You do not need to run an exit node, a relay is just fine: everything is encrypted.
This post will show you how easy it is to set up a TOR relay on Debian, how to nicely monitor it and how to use it as a transparent router.