Keyloggers are surveillance tools, which captures every keystroke on a computer. A number of software products will save the captured log to an encrypted log file. KeyLogger hardware is a tiny hardware device that can be attached in between a keyboard and a computer. It keeps a record of all keystrokes typed on the keyboard.
Allen Concepts, Inc
Manufacturers of KEYKatcher, hardware based keystroke recording devices for PS/2 and USB keyboard connections.
WinSession Logger is monitoring software for Windows. Includes others utilities for Windows and PHP/Mysql resources.
Plug and play hardware keystroke recorders for PS/2 or USB keyboards.
Hardware that records keystrokes with a tiny module that plugs into keyboard, for detecting and preventing unauthorized use of company PC computers.
Comparison of different software based keyloggers.
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.
Free monitoring tool that includes passwords hidden behind asterisks and conversations in common instant messengers.
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.