http://www.Futurestrader71.com
The real deal. I was lucky to find his site in October 2009 and have learned an amazing amount about trading and auction market theory. His webinars and tweets are like a school for traders. He endlessly gives his time and knowledge.
http://www.elitetrader.com
This is an old thread on Market Profile and VPOC. It is a closed thread, but there is a lot to glean from this thread.
http://www.elitetrader.com "they's" thread
Another old and closed thread, but a lot of great information as "They" works his way through market and volume profile.
http://www.RobSpainTrading.com
I've been following Rob almost as long as I've followed FT. Rob is constantly helping traders understand the market context with videos and tweets. I absorb his thoughts almost every day.