Quick note on any utils, (where note is too brief to warrant a whole file)
Capturing animated gifs
Two super simple apps for this, LICEcap and gifcam. Gifcam (from http://blog.bahraniapps.com/gifcam/) lets you edit/remove frames.
Hard drive space -- squarified treemap
SpaceSniffer is my current go to tool for working out where all your hard drive space went. Previously used SpaceMonger, and at one time used SequoiaView.
I noticed recently that the industry favorite WinDirStat also includes a squarified treemap.