FastTasks 2 provides a number of useful functions, including at-a-glance display of key system info, fast toggle of invisible files, free memory, automatic removal of login items, and scanning for troublesome apps and files.
FastTasks 2 allows you to keep logs of your system profile over time so you can easily see what changes were made to your system and when--a vital aid when things stop working as expected and you need to troubleshoot your Mac.