WIN 7
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Win + Arrow left/right: 
snap open window to 1/2 monitor frame

Win + Arrow up/down: 
up: full screen (maximize window)
down: restore / minimize

Alt + F4:
Exit program / close window

Win + D:
Show desktop

 

Eclipse (w/ CFeclipse)
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Ctrl+Alt+Up/Down arrows
Duplicate line

Alt+Up/Down arrows
Move line

Alt + F > A
Save as

Ctrl + Shft + R
Open file w/ search by name


Firefox
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Ctrl+T
New Tab

Ctrl+T
New  Window

Ctrl+Shift+Q
Inspect Element (Firebug)

Ctrl+Shift+F
Display Element Information (Web Dev Tools)

Ctrl+Shift+W
Close window (close all tabs)

Ctrl+W
Close current tab