I will be adding to this if, and when.
A Softer World. Surrealism! Several times a week.
Bad Machinery. Schoolyard chums comedy – British-style! M-W-F.
Day By Day. Conservatism! With cheesecake! And pop references! Daily.
Dresden Codak. Transhumanism! Erratic.
Erfworld. RTS world! Erratic.
Guilded Age. Gamer Humor! M-W-F.
Kitty Hawk. Air Pirates! Weekly.
Lovecraft is Missing. Spooky Cthulhu Mythos! Twice weekly.
[Questionable Content now dropped. Politics is politics, the c-word is something else again.]
Skin Horse. Errr… Wizard of Oz!? Velveteen Rabbit!? Daily.
Something Positive. Misanthropy! Tries for daily.
xkcd. Math! M-W-F.