HockeyKit, update framework for iOS Ad-Hoc and Android applications.
It provides easy server and client components to distribute beta versions seamlessly to your beta testers. HockeyKit supports iOS 3 and iOS 4 on the client apps, but requires iOS 4 on the clients to make us of the In-App-Updates feature. Android support is currently being added.
The server requires PHP5 but doesn't need a database. Check out this blog post for a quick overview of how Hockey works.
QuincyKit is a framework for Mac OS X and iOS that helps developers to manage crash reports during development, beta phase and after rollout.
It provides client framworks which handle detection of crashes and sending them to your own server, and a server component (PHP required) to receive and manage the crash reports. The server components automatically groups similar crashes together and provides an optional feedback channel to the user.
WorldView for iOS
WorldView is a set of iPhone applications for viewing webcam images from whereever you are.
WorldView is available in a free edition and also in a plus edition with a much improved experience and additional iPad support.