I'm looking for resources on various code/API documentation syntaxes, such as Javadocs. Are there any other widely used documentation syntaxes? I'm specifically looking for those used in association with C, C++/Objective C/Cocoa, Shell Scripts (if any) and Java, with PHP/Ruby/Python and the like being a second priority.
Thanks for any help.
P.S. - Do people use Javadoc syntax in C/C++/Objec-C projects, or not so much?