http://m.webtoons.com/ (mobile site)
http://thcmpny.com/naver.html (better version for PC reading)
Thats the new official english webcomic website of Naver, a South Korean internet company which has started to translate some of their contributor's webcomics to English. In recent years, webcomics have blown up in South Korea and a lot of great ones have been produced, with authors even making money by being paid by the number of views they get. They are read starting at the top & by scrolling down rather then by pages.
I've been reading some of the fan translations of some of them for the past couple years. Personally on the above site, I recommend Tower of God (its a really great fantasy action comic), Noblesse (Supernatural), and The God of High School (Action/Fantasy/Martial Arts). They have those three completely caught up to the original Korean ones.
Others not wholly on that site that I would recommend are:
The Dragon Next Door (Comedy):
http://www.batoto.net/read/_/186300/the-dragon-next-door_ch1_by_odd-squad-scanlationsMagician (Fantasy):
http://www.batoto.net/read/_/3127/magician_v1.01_ch1_by_easy-going-scansOrange Marmalade (Supernatural/CockPony/Romance):
http://www.batoto.net/read/_/12775/orange-marmalade_v1_by_webtoon-liveDICE (Supernatural):
http://www.batoto.net/read/_/190343/dice-the-cube-that-changes-everything_by_soul-scansThe Gamer (Fantasy):
http://www.batoto.net/read/_/191673/the-gamer_v1_ch1_by_bap-scansAmerican Ghost Jack (Horror):
http://tapastic.com/episode/40099City of the Dead Socerer (Sci-Fi/Supernatural):
http://www.batoto.net/read/_/67071/city-of-the-dead-sorcerer_v1_by_death-toll-scanlationsLessa (Sci-Fi/Supernatural):
http://www.batoto.net/read/_/118467/lessa_v1_ch1_by_vendetta-scansKnight Run (Sci-Fi):
http://www.batoto.net/read/_/3993/knight-run_ch1_by_jasoKubera (Fantasy):
http://www.batoto.net/read/_/76887/kubera_v1_by_the-companyThats just a small selection of some of the ones I've enjoyed. You can find a whole bunch of fan translations of ones at:
http://www.batoto.net/search?genres=;i36&genre_cond=or also alongside the above official site.