Librivox is a wonderful site for reading novels. It focuses on audiobooks of public domain works. If you prefer listening to novels rather than reading them in text, this is a great choice. Volunteers read and record the books, so there's a wide variety of voices and reading styles.
Project Gutenberg is a wonderful site. Although it mainly focuses on classic literature which can be considered as a form of web novels in a broad sense. It offers thousands of free e - books that are in the public domain. You can find works from authors like Jane Austen, Mark Twain etc. and read them for free.
I'd recommend KissManga. It offers a decent range of josei manga titles. But keep in mind that some regions might have restrictions on accessing such sites.