Here are some great Free Blogger Template sites and some that I have used along the way:

Blogmundi
Blogskins
Blogger Buster
Blogger Templates
Blogger Templates - Deceblog
Bloggertemplates.org
Blogger Themes
Blogspot Template.com
Blogspot Templates
Free Templetes
Fresh Blogger Templates
Final Sense
Gecko & Fly
Isnaini.com
Noipo.org
Templates for Free

Photo by: diegopetrucci

Would you like to add to the list? Post in the comments and get a back link!