animated stuff
All-seeing eye
bat
blood line
Christmas lights
Earth
ghost (I call him Repsacton)
Green guy (Hitchhiker's Guide to the Galaxy)
JIF
oni
United Federation of Planets emblem

paintings and posters
The Great Wave off Kanagawa (Hokusai)
Mulder's poster (The X-Files)
The Persistence of Memory (Salvador Dalí)
The Scream (Edvard Munch)
Starry Night (Vincent Van Gogh)

random stuff
Fezzer the Pkunk (Star Control 3)
Infinity Glove (I made this, based on the Infinity Gauntlet- from the comics, not the later movies)
Tenchified Alice in Wonderland