A visual cheat-sheet for the 97 keyboard shortcuts found in GIMP.
R — Rectangle select
E — Ellipse select
F — Free select
U — Fuzzy select
Shift O — Select by color
I — Scissors
B — Paths
O — Color picker
M — Move
Shift C — Crop and resize
Shift R — Rotate
Shift T — Scale
Shift S — Shear
Shift P — Perspective
Shift F — Flip
T — Text
Shift B — Bucket fill
L — Blend
N — Pencil
P — Paintbrush
Shift E — Eraser
A — Airbrush
K — Ink
C — Clone
V — Convolve
S — Smudge
Shift D — Dodge or burn
X — Swap colors
D — Default colors
Ctrl N — New image
Ctrl O — Open image
Ctrl Alt N — Open image as new layer
Ctrl D — Duplicate image
Ctrl 1-0 — Open recent image 1-10
Ctrl S — Save image
Ctrl S — Save image under a new name
Ctrl Q — Quit
Ctrl L — Layers
Ctrl Shift B — Brushes
Ctrl Shift P — Patterns
Ctrl G — Gradients
Ctrl Shift T — Tool options
Ctrl P — Palettes
Ctrl Shift I — Info window
Ctrl Shift N — Navigation window
Tab — Jump to next widget
Shift Tab — Jump to previous widget
Enter — Set the new value
Space — Activate the current button or list
Ctrl Alt PgUp — In a multi-tab dialog, switch tabs
Shift L — Open location
Alt Up — Up folder
Alt Down — Down folder
Alt Home — Home folder
Esc — Close dialog
F10 — Main menu
Shift F10 — Drop-down menu
F11 — Toggle fullscreen
Shift Q — Toggle quickmask
Ctrl W — Close document window
+ — Zoom in
- — Zoom out
1 — Zoom 1:1
Ctrl E — Shrink wrap
Ctrl Shift E — Fit image in window
Ctrl Shift R — Toggle rulers
Ctrl Shift T — Toggle guides
PgUp — Select the layer above
PgDn — Select the layer below
Home — Select the first layer
End — Select the last layer
Ctrl M — Merge visible layers
Ctrl H — Anchor layer
Ctrl Z — Undo
Ctrl Y — Redo
Ctrl C — Copy selection
Ctrl X — Cut selection
Ctrl Shift C — Copy visible
Ctrl Shift V — Paste as new image
Ctrl V — Paste clipboard
Ctrl K — Clears selection
Ctrl Shift C — Named copy selection
Ctrl Shift X — Named cut selection
Ctrl Shift V — Named paste clipboard
Ctrl , — Fill with foreground color
Ctrl . — Fill with background color
Ctrl ; — Fill with pattern
Ctrl T — Toggle selections
Ctrl A — Select all
Ctrl Shift A — Select none
Ctrl I — Invert selection
Ctrl Shift L — Float selection
Shift V — Path to selection
Ctrl F — Repeat last plug-in
Ctrl Shift F — Reshow last plug-in
F1 — Help
Shift F1 — Context help