Currently I am preparing talk about ruby refactoring so I would like to have all the snippets in #presentation highlighted. So I found a great highlighter:

If you have brew install just run

brew install highlight

and you are ready to go.

To highlight ruby snippet for example you need to run:

pbpaste | highlight --syntax=rb -O rtf high.rb | pbcopy

and highlighted code will be in your clipboard so you can paste it into #keynote.