http://github.com/mirek/NSMutableDictionary-REST.framework is easy to use.
To get REST as a dictionary from the GitHub API as an example:
NSString *url = @"http://github.com/api/v2/xml/user/search/mirek";
[NSMutableDictionary dictionaryWithRESTContentsOfURL: url];
Send a message:
[myDict postRESTWithURL: @"http://localhost:3000/my-rest"];
It supports sync / async, intuitive array conversions, url encoded and multipart messages (you can send images and other files).
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