Some favorites:
I'm sure there are others, but I'm drawing a blank right now.
- The Stand
- The Book of Eli
- The Postman
- I am Legend
- Terminator 1 & 2
- The Road Warrior
- War Games
- Red Dawn (original, not the remake)
- Independence Day
- The Hunt for Red October (not really apocalypse, but someone else mentioned it, so...)
I'm sure there are others, but I'm drawing a blank right now.