TypeRecorder for Mac

From Rampell Software:

TypeRecorder records everything that you type on your computer. Every keystroke is saved to a daily file on your computer, available for immediate retrieval. This is especially useful if you want to have some degree of insurance in the case of system crashes, power outages, or any problem that would cause you to lose data. Any data that you enter with a keyboard will be discreetly saved. TypeRecorder is also helpful in monitoring unauthorized use of your computer, as it can log the time and application being used when any key is pressed.
Every day, TypeRecorder will create a log file to keep track of all information typed. These log files can be opened with any Text Editor (SimpleText, Microsoft Word, etc), and you can copy and retrieve information from these files as with any other text files.
You won't even be able to tell that TypeRecorder is running, as it is does not affect the way in which you work or slow down your computer at all.