Jon Simpson
ShowOff
ShowOff is a Sinatra web app that reads simple configuration files for a presentation. It is sort of like a Keynote web app engine - think S5 + Slidedown.
Linked for later reference - I’m trying to move to Markdown wherever possible for content, and this would be a lot easier to version control than Keynote. Not sure about the web-app requirement, but I’ll see how it fits with my presentation workflow.