Current version is in beta! This version is likely stable and fully functional but the code cleanup for release has not taken place yet and the manual has not been updated. If you consider yourself a player and not a tester then grab the last release version, which is 03.03.04.00.R. If you wish to test the latest version then please do so but do it with this in mind.
This is the spiritual successor of BigWigs TotemRange, to describe it in but a few words it's a mod which monitors when ranged buffs are lost/gained and can be used as a communication system for more efficient ranged-buff use.
If you're interested and want to know more, you can check out the manual at Google Docs. The manual is also included in the zip (in the Other folder).
If you're looking for something a bit more tangible, there's now a video demonstration over at veoh. (Note: If bad commentaries or attrociously-low levelled characters offend you, don't click that link. URL now fixed.).
Note: SCT is listed as an optional dependency for this mod, it's used by the SCTAlert module.
Changelog (the version included in the zip has better formatting).