The OWASP iGoat project is a security learning tool for iOS developers to learn about security weaknesses in iOS -- by breaking things as well as fixing them.
iGoat is available ONLY in source code format, and this is the official repository for that code.
On the Downloads tab here, you will find the full iGoat source tree in tar format, or you can go to the Source tab for instructions on using Mercurial to grab (or clone) the source tree.
Be sure to also check out the Wiki tab here for useful documents related to the iGoat project.