An remarkably well-rounded, informative, and upright alternative to your evening news broadcast or even NPR, which has been really declining as of late. Quality current events, journalism, and fascinating interviews.
Hilarious and diverse source of news and politics hosted by The Stimulator. Often compared to a more radical and independent Daily Show with John Stewart.
Excellent TV replacement. A torrent-based integrated distribution channel of independent media. Even supports HD.
Huge collection of public-domain eBooks downloadable in almost any format. Rad.
A community-built and maintained operating system that is secure, easy to use, and free. I use it every day.
An astonishingly feature-complete Digital Audio Workstation that's free and open-source. I don't use it personally, but I love the progress that's being made and would totally use it as the foundation of a studio oriented towards outboard gear.
The best open-source content management system I've ever used and is, in fact, running this site. Modular and flexible , you can do almost anything with it. It's just missing a few key enterprise-grade features. You wouldn't want to use it to host IBM.com or anything, but for personal to medium-sized business use it's primo.
Find farmer's markets near you.
Find quality coffee where ever you're going.
My wife and I don't cook as much as we might want to, but when we do, there's a good chance we're cooking something from 101 Cookbooks. Heidi Swanson's recipies are amazing and healthy.
Tor is an 'onion router', designed to scramble the routes through which your Internet communication travels. It is billed as a service that provides relatively good anonymity, and it does. You should be aware, however, that there are existing successful methods of attacking the network, particularly if you're a government that has the ability to observe both 'ends' of your communication. None-the-less, it's a life-saver for peeps who need to be anonymous or who need to access information/resources that are not available to them (China, Iran, etc). Set up yourself as a relay and donate some bandwidth. You are more anonymous that way anyway...
TrueCrypt is a cross-platform real-time disk encryption program. Use it to protect your data from governments or organization when you travel across borders or from identity thieves in the event of theft of your laptop/drives. It supports 'plausible deniability' or the ability to have two passwords for each encrypted container.
If you're on an open-source platform, it's probably better to use CryptSetup rather than TrueCrypt as its code is more peer-reviewed and community-driven. But, it pretty much does the same thing minus the cross-platform ease-of-use.