Last time I check it out QuickPick from Araelium <http://www.araelium.com/quickpick/> was unable to keep track of files if you moved them. Therefore I stopped using QuickPick. Overflow <http://stuntsoftware.com/overflow/> on the other hand never lost files and is quite similar to QuickPick.

that's why I use both: QuickPick for applications, Overflow for files and folders ;-)