There are other models out there but I thought I'd note one from the usual online stores.
I need a good keylogger! The main thing that it should be invisible everywhere on PC and can't be detected under any circumstances!!!
I'm using Spyrix Free keylogger for about 2 months - it is absolutely invisible. There are different settings for invisibility - up to process invisibility. Recommend it. Downloaded here: http://download.cnet.com/Spyrix-Free-Keylogger/3000-27064_4-75708733.html