Oh No You Didn't (acdablfhjbhkjbcifldncdkmlophfgda): Automatically reload tabs that have crashed (Aw Snap! He's Dead Jim etc.). Handy for Kiosk mode where access is limited.... Read More > or Download Now >
Oh No You Didn't for Chrome
More About Oh No You Didn't
This is not a replacement for correcting problems in the first place (memory leaks especially) and isn't particularly useful in an everyday environment, where you can simply press the refresh button yourself.