anybody know some good data recovery software?
Recover your data before you reformat!
Try Zar (the top one)
Depends on what you mean by "data recovery", if you just want to copy some files from a ruined Windows install, then any Linux live-CD should work.
Anyway, try the links, kimsland posted.
Stellar Phoenix Demo version will scan, analyze and show you the data from your crashed/inaccessible hard drive. You need Stellar Phoenix full version to recover the data from inaccessible drive. The demo copy gives you a much fairer idea about chances of data recovery from your hard disk before deciding upon the purchase.
I haven't tried the demo myself, but if the only thing it gives you is a list of files, then that's probably not any better than knowing nothing. Sure the filenames can be intact, but what about the data?
Edit: If it does show parts of the data it found, then never mind.
Probably I should have said, don't use it.
The others above (my post) can be freely used, and even recover in trial mode !
The ZAR program allows 4 Folders deep in trial mode, full recovery.