Photoshop

Design Tools
Tools
V Move tool Win mac Linux
M Marquee selection tool Win mac Linux
L Lasso selection tool Win mac Linux
W Quick Selection / Magic Wand Win mac Linux
C Crop tool Win mac Linux
B Brush tool Win mac Linux
E Eraser tool Win mac Linux
G Gradient / Paint Bucket tool Win mac Linux
T Text tool Win mac Linux
P Pen tool Win mac Linux
Z Zoom tool Win mac Linux
H Hand tool (pan) Win mac Linux
D Reset foreground/background to black/white Win mac Linux
X Swap foreground and background colors Win mac Linux
[ Decrease brush size Win mac Linux
] Increase brush size Win mac Linux
Canvas Navigation
CTRL++ Zoom in Win Linux
++ Zoom in mac
CTRL+- Zoom out Win Linux
+- Zoom out mac
CTRL+0 Fit canvas to screen Win Linux
+0 Fit canvas to screen mac
CTRL+ALT+0 Zoom to 100% Win Linux
++0 Zoom to 100% mac
SPACE+drag Pan canvas (hold Space for Hand tool) Win mac Linux
Layers
CTRL+J Duplicate layer (or selection to new layer) Win Linux
+J Duplicate layer (or selection to new layer) mac
CTRL+G Group selected layers Win Linux
+G Group selected layers mac
CTRL+⇧ Shift+G Ungroup layers Win Linux
+⇧ Shift+G Ungroup layers mac
CTRL+⇧ Shift+N New layer via dialog Win Linux
+⇧ Shift+N New layer via dialog mac
CTRL+E Merge selected layers Win Linux
+E Merge selected layers mac
CTRL+⇧ Shift+E Merge all visible layers Win Linux
+⇧ Shift+E Merge all visible layers mac
ALT+[ Select layer below current Win Linux
+[ Select layer below current mac
ALT+] Select layer above current Win Linux
+] Select layer above current mac
Selection
CTRL+A Select all (entire canvas) Win Linux
+A Select all (entire canvas) mac
CTRL+D Deselect Win Linux
+D Deselect mac
CTRL+⇧ Shift+I Invert selection Win Linux
+⇧ Shift+I Invert selection mac
CTRL+ALT+D Select and Mask (Refine Edge) Win Linux
++D Select and Mask (Refine Edge) mac
Editing & File
CTRL+Z Undo last action Win Linux
+Z Undo last action mac
CTRL+⇧ Shift+Z Redo Win Linux
+⇧ Shift+Z Redo mac
CTRL+T Free Transform Win Linux
+T Free Transform mac
CTRL+S Save (PSD format) Win Linux
+S Save (PSD format) mac
CTRL+⇧ Shift+S Save As Win Linux
+⇧ Shift+S Save As mac
CTRL+⇧ Shift+ALT+S Export / Save for Web Win Linux
+⇧ Shift++S Export / Save for Web mac