For my various projects, I often find that most of the data I need is not readily available. I am therefore sharing data sets for various information that I have collected from either screen scraping or using Amazon's Mechanical Turk.
Stock Market Historical Data (1970 to 2006)
Screen Scraping - Multiple Sites
Penny Stocks Market Data (Intraday 2008 to 2011)
Screen Scraping - Yahoo! Finance
Fortune 500 & 1000 Contact Information
Amazon Mechanical Turk
List of Open MediaWiki Sites
Screen Scraping - Google
BitTorrent User Trace Information
Tracker Scraping - The Pirate Bay