AppFresh 
AppFresh helps you to keep all applications (third-party and Apple), widgets, preference panes and application plugins on your Mac up to date, from one place. It works by checking the excellent iusethis.com for new versions and lets you download and install available updates easily.
AppFresh not only gets update information from iusethis.com. If you have an user profile at iusethis.com you can manage it from within AppFresh and control which applications appear in your profile, even automatically. We can only recommend you sign up, it's free and lets you see how many users use a certain application. In AppFresh, the full iusethis.com application page with comments and links to similar apps is always just a click away.
AppFresh can capture the installed version of an application along with your preferences and application data and store it in a safe place. This way, you're covered in case you decide you liked the last version of an application better. Create as many snapshots as you want to make sure you don't lose anything.
AppFresh is currently work in progress, and we're not even calling it a beta. Make sure to check our development blog regularly. You are welcome to leave your feedback or suggestions for improvements there.
