Quote from Netherack Creeper
The only visual novel I ever played/read was Analogue: A Hate Story and its sequel Hate Plus. I got partly through its predecessor (Digital: A Love Story). I wouldn't know any others to get into though, the ones my friends play seem somewhat pervy and I'm not into that stuff.
Some of them may seem pervy at first glance due to the very inclusion of erotic content. However, there are a great many amazing stories out there if you're willing to indulge the writers in a tiny bit of eroticism. Katawa Shoujo being one of the best ones, and some of my favorites being Sharin no Kuni and Sekien no Inganock. A couple of my favorite ero-free games are Ever17 and Stein's Gate. There are also a good number of very popular ones I haven't had the time to play, like Muv-Luv alternative, Umineko no Naku Koro ni(ero-free) and 999(also ero-free).
Quote from Govna
Phenomeno is free.
Woah, a free nitroplus game? How on earth did I manage to miss that? I'm gonna have to check it out!