I have been reading and writing a fair amount of Braille lately. Duxbury Systems has an excellent cheat sheet which outlines the different abbreviations used in Grade 2, English Braille. This is a great help to me when I am writing, but it is organized poorly for reading.
I started making myself an inverted version of that cheat sheet, but was quickly frustrated trying to type Braille on my QWERTY keyboard. What to do? I wrote some Emacs lisp code to allow me to type Braille characters into Emacs in the same, chorded manner that one would enter them on a Braille keyboard.
You can find the code on github: braille-chords.el. The documentation is comments at the top of the source file.