Web design blog Bittbox has revealed the secret trick to find the best web freebies: Google + social sites.
Yep, it's true - you can find the best of the best out there just by aiming the "site:" operator at most any active social bookmarking site. For example, say you're looking for good WordPress templates. You could try this search string:
site:digg.com "CSS templates"
You're going to come back with some pretty good stuff this way for the most part, and since most sites search functions ain't that great, it's also a good option for unearthing the stuff you might not have otherwise.
The Fastest way to find High-Quality Freebies on the Web [-Lifehacker - BittBox]
Update: The Google Co-op Social Media Search Engine:
Created by illovich, or you can go to this page and bookmark it. Try a search for a freebie that you want to find and see what you get by only searching the biggest social media sites. (Thanks to Illovich) Or you can get the code and put it in your blog. Here is mine :