Circle Things by Fontsnthings - first seen in 2003.
test drive and detailed view | Download
Dialtone by Dinc Type - first seen in 1997.
detailed view | Download
Gum by Geldmacher-Design - first seen in 2000.
Whizzbang by Kingthings Fonts - first seen in 2003.
Circles JY
Crop Circles
DB Circles - 'Tis The Season
DB Circles - Christmas
DB Circles-Frilly
Running Ncircles