1. Figment, from the Imagination ride at Epcot. Also used heavily on festival merchandise.
2. Zero from Nightmare Before Christmas
3. Looks like Chernabog
4. This is a hidden Mickey series pin, see the small Mickey head? These are often released to CMs or in special series. Not sure which collection this particular one is from.
5. Hard to see for me, maybe Ichabod Crane?
6. This is from a series of Lumiere pins...each mystery pin was part of a candelabra body. Sometimes you'll find heads, torsos, arms, etc, and when you complete a set you'll have a full candelabra character
7. Snow Minnie. This is probably from some kind of winter pin series
8. Beaker from the muppets
9. See answer to 6
10. Jack Skellington in Americana gear
11. Figaro
12. One of the sea animals from Under the Sea from the little mermaid I think. This looks like another hidden Mickey series pin
13. Eve from Wall-E
14. This is from the hidden mickey character candy apple series. I have a few of these, like Goofy and Donald. I can't quite tell from the pictures of this one which character it is supposed to be.
If I got any wrong someone will come along to correct me, but I think I've got 'em!