PopPrintables has a wide variety of designs to choose from, and Mindy also has matching invitations so you could order a whole theme.
I received a PDF file of one sheet of these cute ballet themed toppers. They were so cute and easy to use. I especially like that each design comes with a border too, so that you can use a punch slightly larger than the main circle and have it look finished. I used a circle punch for the prints and then attached them onto purple card stock punched with a scalloped circle in a slightly larger size. Just glue on some popsicle sticks on and you've made cupcake toppers (the punches and popsicle sticks can be found easily at any craft store)!
PopPrintables also has a Zazzle store for printed versions of their digital items, or you can look for collage sheet printables at PopCollage:
Jennifer also has some really cute designs to choose from in her shop, jenleonardini:
I received this soft pink set to print out. It came in a pretty pastel pink with a striped background. They also came personalized with my daughter's name! I punched these out with a scalloped circle punch and attached them onto pastel pink circles using foam adhesives. I thought this gave the topper a nice 3D effect, and made them look a little more fancy. For the finishing touch, I attached those onto a larger pink scalloped circle.
Here's a little info about Jennifer from jenleonardini:
"I am an elementary school teacher in CA and also a new mama to my 13 month old, Isabelle. I have been creating toppers and tags for friends for awhile and just recently opened the shop!"
Jennifer is sponsoring a giveaway of one of her print collections. The winner can either choose something from her shop or request a custom!
jenleonardini and comment about your favorite item
I will choose a winner via random.org on Thursday, August 11, 2011. Good luck!