"Alan Rosenblatt: I have assembled a catalogue of 85 tools to help you run a more effective social media program for your campaign, organization, or business. Most of these are free. A lot are for Twitter. Many help you leverage Facebook and other social media too. Some help you find the best content to share via social media.
Some of these tools are more useful than others."
Unbelievable collection of useful tools
Via Ana Cristina Pratas, Volkmar Langer, Heiko Idensen