Daily comics

Anywhere But Here

Daily Dinosaur Comics

Evil Inc.

Irregular Webcomic!

Kevin & Kell

Narbonic (ended; currently rerunning with commentary)

Ozy and Millie

PvP

Questionable Content

Schlock Mercenary (** my favorite)

Sinfest (* a close second as favorite)

Starslip Crisis

Not daily, but regular (usually MWF)

Girl Genius

The Order of the Stick (** now completely awesome and not-to-be-missed!)

Penny and Aggie

Piled Higher and Deeper

xkcd

Hiatus

Casey and Andy

Cheshire Crossing (not so much on hiatus, as infrequently updated---every six months or so)

Checkerboard Nightmare

Gossamer Commons (set in Ithaca!)

Pet Professional

Skinny Panda

Comics collectives

Blank Label Comics

Keenspot

Modern Tales

Comics in syndicate

Comics.com

King Features Syndicate

uComics

Not a comic, but big in the webcomic world

Websnark

Comixpedia