So last month I started making UserStyles for Facebook. UserStyles are CSS style sheets loaded into your browser to modify the look of certain websites.
So I made Facebook UserStyles!
My first one is called SmoothRed. It started off modifying a theme of some pink userstyle for Facebook after looking for a red theme. I realized that modifying this style was going to be more of a pain in the ass than to just completely make my own theme. So that is what I did.
It seems like it is getting more popular (close to 7000 installs since it's debut). Not quite a popular as some themes but more popular that most themes.
Find it here:
http://userstyles.org/styles/52576/smoothred-for-facebook