iOS Hierarchy viewer - View and Coredata debugging made easy
iOS Hierarchy Viewer allows developers to debug their hierarchies for both UIView's and CoreData models. If there are problems with layout calculations, you can find them with ease by introspecting real-time preview of your views inside a browser. If your data is behaving weirdly, you can easily navigate through it via a browser. This tool predates commercial tools like Reveal and Spark Inspector, and it's available for free.
The Open Log Engine is a powerful tool for advanced logging in games or programs. It easily allows you to make logging outputs in your program and analyse them afterwards with the Open Log Viewer, which provides you a powerful filtering system.