Documentation Framework like JavaDoc for Objective C

Good news for all! :D Finally after waiting a long time Apple has introduced a parser comments for our projects. According to the new features in XCode 5:

Project documentation from framework API reference documentation and structured comments in your own source code are displayed in the quick help panel and in code completion popover views. Doxygen and HeaderDoc structured comments are supported formats.

and from the Clang 3.2 release notes:

Clang parses the comments and can detect syntactic and semantic errors in comments. These warnings are off by default. Pass -Wdocumentation flag to enable warnings about documentation comments.

If you want to see an example of this new feature I recommend you take a look at the following article: Documentation in Xcode 5

Doxygen! You can use it for many languages, including Objective-c

Doxygen is quite popular among Obj-C developers.

You could have a look to HeaderDoc wich is the apple documentation framework similar to Java.