Excel Formulator (free): Excel Formulator is a simple program designed to format your complex Excel formulas into a readable format and back again to an excel formatted formula. Simply place your formula into the upper boox and hit CTRL-F, and it will be formatted into an easy-to-read syntax. If you need to collapse your formatting to place it back into Excel, place it in the lower box and hit CTRL-U (or use the menu). This program is open source licensed; feel free to use and distribute as you see fit. This piece of sofware is very rough and distributed as-is.

Files:
Windows Installer
Source Code

ASAP Utilities
(free): If you spend more than 15 minutes a day in Excel, this collection of utilities will save you a TON of time. One of the best freeware utilities in existence.