My Desktop

Mouse:

Left mouse button: Action/Attack
Right mouse button: Shield
Mouse 5: Move forward
Mouse 4: Move Back
Scroll up: Weapon 1
Scroll down: Weapon 2

Keyboard:

W: Move North
A: Move West
S: Move South
D: Move East
Z: Move Left
C: Move Right
E: Weapon 3
Q: Weapon 4
Left Shift: Weapon 2
B: Toggle map
Space: Dash

My MacBook (No mouse)

Keyboard only:

W: Move North/Face North
A: Move West/Face West
S: Move South/Face South
D: Move East/Face East
C: Move Forward (When I feel like using trackpad)

Up: Attack
Down: Shield
Left: Weapon 1
Right: Weapon 2
E: Weapon 3
Right Alt: Strafe
Left Shift: Weapon 2
Q: Weapon 1
Space: Dash

Although it's been a while since I've played LD, here you go:

Keyboard/Mouse
WASD: Movement
Spacebar/Mousewheel: Weapon switch
Left Click: Shield
Middle Click/F key: Dash
Right Click: Attack

Xbox 360 clone
Left Stick: Movement/Direction
Right Stick: Weapon switch
A: Attack
B: Shield
Shoulder Buttons (Don't remember which is which): Auto Target, Dash, Strafe

(Keep in mind that I almost always stick with 2 weapons. However, you probably could map E/Q/R/F to weapons. I also usually do Clockworks, so my gamepad is mapped for that. :S)