Stockwatch Pro
http://www.crontech.com/swp
Have been using SWP software for a while. The scanner is pretty good. I use it daily to find stocks breaking through the high or low of the first 30 minutes.
Yep, it's not free but definitely worth the price. Stockwatch pro pretty much has everything I need. I use realtime scanner, back tester, indicator alerts. I can chart 3 and 5min stochastic together, which is quite useful. Works well with TWS.