LogicielMac Update

LogicielMac Update is useful app that checks for updates for all of your non-Apple applications. It will automatically check for updates at a set interval anywhere from every hour to every month. The applications with updates will be downloaded and automatically installed.

One of my favorite features is that LogicielMac Update doesn't mind the organization of my Applications folder. It happily replaces the apps in the folder they were in and checks the sub-folders of my Applications folder.
My Aplications Folder

Another cool feature of LogicielMac Update is that it will let you interact with DMG licenses and the finish installing the application. And, if there is an application that you don't want to have updated, just add it to the blacklist and LogicielMac Update won't check for updates.

Overall, LogicielMac Update is a great little application to help keep your applications up to date.