Geometric Animal

Above are geometric animal coasters. They are laser cut and etched into maple wood and come from The Campbell Craft.

Chewbacca

Above is a granite coaster of Chewbacca. It is laser etched into granite and comes from So Hot Right Now.

Coasters

Above is a laser cut and etched leather coaster from Sawyer Maker Lab.

Alphabet Coasters

Above is a laser cut felt coaster from The Little Factory.

Birch Coaster

Above is a laser cut birch wood coaster from Green Wood LT.

Crazy Daisy

Above are laser cut birch plywood coasters from Green Wood LT.

Coasters

Above are laser cut and etched adler wood coasters from A Fluttered Collection.

Coasters

Above is a laser cut felt coaster from Alljoy Design via Jam Art Factory. 

Wine Coaster

Above is a laser cut bamboo wine coaster from Dimlim.

Coasters

Above is a laser cut and etched acrylic drink coaster from Invenio Craft.

Coaster

Laser cut wood coaster from Green Wood LT.

Macrame Knot

Laser cut felt Macrame Know Coasters from Lizz Aston.

Coaster

Laser cut leather coaster from Pete Blacker.

House Coasters

houses2, originally uploaded by peppersprouts & upstatefancy.

Truly amazing and inspired. They are laser cut from Rimu wood by Ponoko and sold through Peppersprouts' Etsy page.

Type Coasters from Ponoko

They are the best they have (despite not being sans serif) and as far as I can tell they are not available anymore. Read more at Ponoko's Blog.