If you're putting together a presentation on a Mac in Keynote or PowerPoint and need to code look pretty with syntax highlighting for your slides, you're just a few commands away.
First you'll need to install highlight.
$ brew install highlight
Then run the following command.
$ pbpaste | highlight -S ruby -O rtf -s dusk | pbcopy
Now paste the contents of the code into your presentation and violà!
There are several themes to choose from if you don't fancy the dusk theme.
$ highlight -w acid aiseered andes anotherdark autumn baycomb bclear biogoo bipolar blacknblue bluegreen breeze bright camo candy clarity dante darkblue darkbone darkness darkslategray darkspectrum denim dusk earendel easter edit-anjuta edit-eclipse edit-emacs edit-flashdevelop edit-gedit edit-jedit edit-kwrite edit-matlab edit-msvs2008 edit-nedit edit-vim-dark edit-vim edit-xcode ekvoli fine_blue freya fruit golden greenlcd kellys leo lucretia manxome maroloccio matrix moe molokai moria navajo-night navy neon night nightshimmer nuvola olive orion oxygenated pablo peaksea print rand01 rdark relaxedgreen rootwater seashell solarized-dark solarized-light tabula tcsoft vampire whitengrey xoria256 zellner zenburn zmrok
Now get out there and present some code!