ZTProxy is a project mainly written in OBJECTIVE-C and C, it's free.
Small wrapper class for the ZooTool API
ZTProxy is a small helper to access the ZooTool API within an objective-C app.
ZTProxy requires json-framework
ZTProxy* prox = [ZTProxy defaultProxy];
NSURLCredential* cred = [NSURLCredential credentialWithUser:@"XXX"
password:@"XXX"
persistence:NSURLCredentialPersistencePermanent];
[prox useCredential:cred];
NSLog(@"%@", [prox userWithUsername:@"bastian"]);
NSLog(@"%@", [prox itemWithUID:@"ooq2k"]);
NSLog(@"%@", [prox userFriendsWithUsername:@"bastian" withRange:NSMakeRange(1, 2)]);
NSLog(@"%@", [prox popularItemsWithRange:NSMakeRange(1, 2)]);