David Fanning recently used IDLdoc to generate [documentation][docs] for his Coyote Graphics library:

> On-line documentation is now available for all 41 of the Coyote Graphics programs. (These are a subset of the programs in the Coyote Library.) This will make it much easier to use these Coyote Graphics programs.

[docs]: http://www.idlcoyote.com/idldoc/cg/index.html "Coyote graphics documentation"