id log

Quickly consolidate information from multiple log files.

Spy and record all your keyboard keystrokes in a log file in the background.

Track weight and log diet information.

Monitor & log changes in your Mac energy use.

Monitor Facebook log-in activity.

Free server log file analyzer.

Display log files, UNIX command output, and more

ARPWatch / Log Watcher for Mac OS X and Linux

a graphical configuration tool for the web log analysis tool Analog.

iPhone Developer Program Members can log in to download iPhone SDK