NSURLConnection is very useful, but it can buffer data coming in from the network and this can be undesirable in some applications. SZURLConnection is meant to be a drop-in replacement for basic NSURLConnection functionality. It supports a similar delegate methodology to NSURLConnection.
Limitations: SZURLConnection does not support caching or authorization delegate methods.
This is an NSWindow subclass designed to be used as an NSWindow child window. It's usage is described in [this blog post] (http://blog.stuntaz.org/cocoa/2009/11/03/nswindow-overlay.html)
I often have to compare NSDate's and the built-in compare method always confuses me. I want to just use relational operators instead of having to things about an NSComparison result. This category on NSDate provides that. I find it helps readability and helps prevent bugs by being more clear in one's intentions.