With over 400,000 apps on the app store, discovering new apps can be a bit of a nightmare. The Discovr Apps app lets you use the same tree-branching mechanic to find apps that you may like, based on other apps you select or following one of the "Suggested" Apps. You can then see similar applications and once you find something that interests you, you can look at screenshots, information and download it from the App Store.
The app itself is $1.19 and universal for both iPad and iPhone. If you own an iDevice and want to get the most from your apps, this is a must purchase.