Favorite appetizers for a party?

I'm working on finalizing all the plans for our Halloween party coming up and I think I need like 2-3 more appetizers. Preferably on the cheaper side. Finger foods or just something for everyone to munch on throughout the night. Something I can make ahead is definitely a bonus. Preferably nothing in the slow cooker. I'll already have 4 of my slow cookers being used and would rather not have to use my other one too.