Baking without Eggs

What do you do when you're in the middle of baking and suddenly realize there are no eggs in the house?  Substitute something else you do have, of course!  I saw these Egg Substitutions on Facebook and thought this list might come in handy someday.  So I'm sharing.

I'm going to have to try some of these even if I'm not out of eggs.  Just because.  I'll save the eggs for omelets!