Hazel for OSX

Somehow I never heard of this app before but it's really fantastic. Basically it just lets you monitor a folder and setup rules using a very flexible criteria matching system. (kinda like SmartPlaylists in iTunes)

So for example, I just setup my downloads folder to automatically sort PDF files into a sub-folder called Documents, DMG/EXE/ISO files into another one called Software, and to delete incomplete downloads after a week.

The most interesting part of this app is the power to run AppleScripts & shell scripts. That gives it unlimited power. I'm trying to figure out how to make a shell script that automatically encodes new video files into an iPhone/ATV friendly h264 using ffmpeg and then send a growl notification when it's done.

So many great OSX apps out there these days.