IMSurfSentinel

This program monitors your computer's use and protects it from unauthorized access, although IM surveillance is limited to AOL Instant Messenger.

IMSurfSentinel's well-organized interface lets you enter user-defined keywords and phrases to easily block sites, conversations and programs. You can block certain programs from running, and you can specify the URLs to prohibit. Define a target time interval and IMSurfSentinel will accurately monitor your system's activity using screen captures and keyloggers. The program is hidden on your system and includes standard password-protection features to protect configurations from unauthorized alterations.

While it performs well, the program only provides individual logs for AIM. For all others, you'll have to check out the keylogger entries, and even then the other parties' messages aren't logged. It's not as powerful as some other monitoring applications, but IMSurfSentinel does provide customary system monitoring.