Emacs 
A very versitile editor.
- meta-Q justifies text
- ctrl-x-s saves file
- ctrl-uparrow, ctrl-downarrow moves up or down by paragraphs
- ctrl-leftarrow, ctrl-rightarrow moves left or right by full words
- ctrl-y paste ("yank")
- ctrl-w cut ("wipe")
- ctrl-4 e `e' is repeated four times. If you hit ctrl-4937 you'll get 4937 repetitions.
- scrollbar: left-click scrolls down, right-click scrolls up, middle-click pans