GPIO pinout
There seem to be hundreds of different attempts to come up with a clear understandable diagram of the Rpi GPIO pinouts, this one taken from the RasPi.TV website and includes the B+ works well for me – but I am sure not all will agree ……
Raspberry Pi Full pin functions

Credit to ‘Particle Docs’ for this diagram
The GPIO cheat sheet is also well worth a look
http://raspi.tv/download/RPi.GPIO-Cheat-Sheet.pdf