Macro for Cocoa-Singletons
I’ve found a useful macro for creating Singletons: Download
The macro was created by Matt Gallagher.
Here is an Example how you can use it:

(Source: cocoawithlove.com)
My most used Frameworks
My first most used Framework - and i think you know this framework already - is Growl
The next Framework i use very often is BWToolkit. BWToolkit gives you some nice and useful Controls for InterfaceBuilder. My Favourite Controls are the Selectable Toolbar and the Bottom Bar.
For Software Updates the Sparkle Framework is very nice. Its Easy-to-Use and is used in many other applications.
And the last one are the OmniGroup Frameworks which are providing some nice enhancements to the code like a faster StringScanner, better RegularExpressions or an easy Networking-Framework.

