Installer is one of the most useful apps on the iPhone. Created by the folks at <a href="">Nullriver Software</a>, Installer keeps an online repository of all the native 3rd party iPhone applications, and allows for one click installation of them to your iPhone, directly from the app. A must-have.

Installer is available from <a href="">their site</a> as a GUI install app, and via iBrickr/Breezy.

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