This contains sample Objective-C library code
NSArray-Intersect: Extends the NSArray and NSMutableArray classes
NSDictionary-DeepCopy: Extends NSDictionary by adding the capability to do deep copies
NSString-MHString: Extends NSString and NSMutableString
NSIndexPath-Iterating: Extends NSIndexPath by adding iteration, including up and down children
TreeIterator: Iterates through tree structures (usually NSDictionary objects) using an NSIndexPath as the position
plistReader: Object for reading values given a key from plist (xml) files