Miscellaneous
 Programs that don't fit into one of the above categories.

Correlation Coefficient ~ Forum Topic
For another help request: a small GUI to calculate the correlation coefficient of two sets of numbers.

Anagrams ~ Forum Topic
A short and sweet bit of code that returns the anagrams of any word or group of letters. This is particularly useful when playing Scrabble, so the above download link includes a zip file with a database containing the official Scrabble dictionary. See the forum topic for more information and a link to a full-featured anagram solver.

WinOnTop ~ Forum Topic
An AHK recreation of the popular WinOnTop program. It can set any window on the top or bottom of others and will reside in the system tray to be used when convenient. If you're looking for more features like resizing, hiding, rolling up into title bar, hotkeys, and control over multiple windows, check out this forum topic.

Clipboard History ~ Forum Topic
Updated: 12/4/09
As the name implies, this script keeps track of all the text you put on the clipboard, in case you need it again after it's been replaced. It can save all the old contents to a text file or put items back on the clipboard to use again. The script also includes some code that formats URLs placed on the clipboard for use in the AutoHotkey forum. See the forum topic for more information.

StopWatch
A simple little timing device that became a surprisingly long experiment. The name pretty much describes it. Note: it does NOT keep accurate time; CPU load affects its performance. I haven't been motivated enough to fix it, however. ;) Besides, there is a better script already written.