Hark-hubot-scripts is a project mainly written in CoffeeScript, it's free.
Hubot Scripts from Hark.com
Hubot scripts that we use at hark.com in our Campfire project rooms.
hark.coffee
Usage: @mybot hark me What do we get for ten dollars?
Soon To Be Released ...
Movie quotes and stills from our application at Hark.com
weather.coffee
Usage: @mybot weather in 98122
Gets the weather forecast from Google's weather API.
Original implementation found in Convore's evilbot.
https://github.com/defunkt/evilbot
trollface.coffee
Usage: @mybot problems?
Trollface example in Github's blog announcement of hubot.