Inline creation of objects in iOS Objective-C from the Foundation Framework

To create inline instances of immutable objects:

Class Immutable Creation Availability Comments
NSArray @[ obj1, obj2, obj3 ] iOS 1.0 ?
NSDictionary @{ key1, value1 } iOS 1.0 ?
NSString @"mystringstext" iOS 1.0
NSNumber @(numericvalue) iOS 6.0

Examples:

NSNumber:

NSNumber *n = [NSNumber numberWithInt:12];
NSNumber *one = @1;
NSNumber *numericalValueOfAnEnum = @(NSUnderlineStyleSingle);
NSNumber *numericalValueOfAnExpression = @(someClass classMethodReturningANumber);