PC Surgeon 

PC Surgeon is a powerful tool that will diagnose, monitor and repair your Windows XP (NT,2000 supported) platform. Over 70 features and functions. Tools to recover passwords, recover deleted files and easily tune-up the whole system
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CheckQuota 

CheckQuota is the professional monitor program for directories. If a directory exceeds a specified limit CheckQuota sends an mail alert and can lock the write access for specified users or groups.
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BySoft Network Monitor 

BySoft Network Monitor 1.2 displays all kind of information in real time (1-second update) about all network adapters (network cards, RAS connections, virtual cards, server monitoring for web hosting) in your system.
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wAPI Monitor 2000 

wAPI Monitor 2000 is a small utility that allows you to monitor the debugger messages sent by many MS Windows applications and utilities. Facilities are also included to add diagnostic output messages to any software project that you are developing
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PCSentinel's Smoking Gun: Keylogger and More! 

PCSentinel's Smoking Gun! monitors and records all keystrokes, web pages visited, applications used, takes periodic screen shots, and provides parental controls! Easiest-to-use keylogger and monitor software on the market.
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Colasoft Capsa 

Easy-to-use network monitor and protocol analyzer designed for packet decoding and network diagnosis, helping network administrators troubleshoot network problems.
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