Does anyone know were 당신 can find online novels? I've already know Quizilla and Wattpad.

Novels? Like fanmade novels? There's fanfiction.net.

I am not sure about online novels but manybooks.net is a very good one to download novels :)

fictionpress.net
mibba.com

To write stories there's:
Quibblo
To read try:
구글 Books
Issu

www.4shared.com

당신 don't need to make an account and its completely free of charge. 당신 can not only read the 책 but download them completely. its the best site i have ever found.

Scribd
OnRead(if 당신 don't mind typos)