At the moment, with Blender going through extreme changes developmentally from 2.79 to 2.8, the keymap is a mess, which is probably why even the Blender Wiki isn't available. Though I can tell you the ones I use by heart (and appear in this course):
- I = Inflate brush
- P = Pinch
- SHIFT + C = Crease
- Hold SHIFT = Smooth brush
- G = Grab
- M = Mask
