This is a pretty cool library:
"ASIHTTPRequest is an easy to use wrapper around the CFNetwork API that makes some of the more tedious aspects of communicating with web servers easier. It is written in Objective-C and works in both Mac OS X and iPhone applications."
- http://allseeing-i.com/ASIHTTPRequest/
Also, here's a list I stumbled upon in my travels:
- http://code.google.com/p/iui/ (UI library for Safari iPhone apps)
- http://iwebkit.net/ (another UI library for Safari)
- http://code.google.com/p/oolongengine/ (Google engine for iPhone)
- http://www.smartfoxserver.com/labs/API/ (SmartFoxServer multiplayer engine details for their new iPhone/iPod Touch API)
- http://code.google.com/p/cocos2d-iphone/ (Objective-C based 2D engine for the iPhone)
- http://www.unity3d.com (3D engine for iPhone and other platforms)
- http://blogs.unity3d.com/
- http://iphonedevelopment.blogspot.com/2008/12/updated-opengl-es-xcode-project.html (OpenGL template for Xcode)
- http://www.garagegames.com/products/consoles (2d and 3d engines for iPhone)
- http://www.garagegames.com/products/torque-2d/iphone
- http://www.stonetrip.com/ (3d development tool)
- http://code.google.com/p/cocoahttpserver
- http://sio2interactive.com/HOME/HOME.html (free open source 3D engine for iPhone)
- http://homepage.mac.com/aglee/downloads/appkido.html (great alternative for the class/library browser)
- http://code.google.com/p/simple-iphone-image-processing/
- http://code.google.com/p/appsales-mobile/ (locally built app for gathering metrics on your app)
- http://ioquake3.org/
- http://en.wikipedia.org/wiki/Id_Tech_3
- http://unifycommunity.com/ (community for Unity3d development)
- http://www.fmod.org/index.php/products/fmodex (music/audio engine)
- http://code.google.com/p/simple-iphone-image-processing/
- http://groups.google.com/group/cocos2d-iphone-discuss
- http://monoclestudios.com/cocos2d_whitepaper.html
- http://www.neverreadpassively.com/2009/03/review-of-iphone-3d-engines.html
- http://code.google.com/p/bullet/ (physics engine)
- http://www.box2d.org/ (physics engine)
- http://digitalbreed.com/2008/3d-engines-on-iphone-ipod
- http://wiki.slembcke.net/main/published/Chipmunk (physics engine)
