Can anyone here recommend a free website or a free software package that scans stocks to find specific criteria (like largest % gainers . . .etc. . .) ? ? ? A good one !

Quote from 1Reason:
I dont think you can beat www.blocks.com
it can do it all and just about make lunch too. its free for end of day data and pretty cheap for real time data.

Quote from Galactus:
It amazes me that so many people want something good but then want it to be free.
Why not pay for a decent scanner. It should pay for itself from better trades you find.