instead of listing open source components.
Here are the sites from were you can find reusable components
1) http://cocoacontrols.com/
2) http://open.iphonedev.com/
3) http://cocoaobjects.com/
Here is the twitter account where you can find popular reusable components on github about iPhone or iPad
4) https://twitter.com/#!/github_objc
as answered here Is there a gallery of reusable iPhone components on the web?
