Windows: WinPatrol Plus is a powerful Windows monitoring tool which regularly retails for $US40. It's available, today only, for 99 US cents.
WinPatrol Plus continually monitors your system and takes system snapshots to record system changes, critical spikes in resource usage, and other events you want to be alerted of. If you want to monitor your system and keep tight control over aspects of it like what programs launch at startup or run in the background — no matter how deeply buried in the system they are — WinPatrol is a great tool for doing so. You can visit the author's site for more information or jump directly to the Yahoo! store that processes the orders — in case the offer today tanks the author's site.
WinPatrol Plus is Windows only and on sale, today only, for 99 US cents. Have a favourite Windows monitoring tool? Let's hear about it in the comments.