Software that logs all actions and keystrokes into a text file. Versions available for OS X, 8 and 9 for Mac, and Windows98 and higher. 5-day free trial available.

Hardware that records keystrokes with a tiny module that plugs into keyboard, for detecting and preventing unauthorized use of company PC computers.

Compact software tool to record all keystrokes along with the time of their performing and the application they were entered in, both in visible and stealth mode. Shareware and freeware versions are available.

Manufacturers of KEYKatcher, hardware based keystroke recording devices for PS/2 and USB keyboard connections.

Keystroke logger information, prevention, removal, and downloads for key capturing programs and hardware for all operating systems.

Plug and play hardware keystroke recorders for PS/2 or USB keyboards.

Comparison of different software based keyloggers.

Designers and manufacturers of hardware devices for PS/2 and USB keyboards as well as laptop compatible devices and PCI card versions.

Free monitoring tool that includes passwords hidden behind asterisks and conversations in common instant messengers.

A free, open source application written in Python that keeps a log of all keystrokes. Screen shots, documentation and a support forum.