I've made two versions of this list. http://www.xuenay.net/Rope/Grab-bag.pdf has the short version, which lists all kinds of different mechanics but doesn't say anything about what they mean. For somebody just looking for inspiration, that alone may be sufficient.
http://www.xuenay.net/Rope/Grab-bag_long.pdf is longer, and has actual explanations for what the different terms mean. Well, explanations for part of them, as I haven't yet written descriptions for nearly all of them. (You can help me out here!) There are also some explicit game design challenges scattered there, ones that I came up while writing it.
If anybody comes up with interesting mechanics that you'd like to see included, feel free and tell me. :)