For folks who don't know what Magic Lantern is:
> Magic Lantern is a free software add-on that runs from the SD/CF card and adds a host of new features to Canon EOS cameras that weren't included from the factory by Canon.
It also backports new features to old Canon cameras that aren't supported anymore, and is generally just a really impressive feat of both (1) reverse engineering and (2) keeping old hardware relevant and useful.