I shall contribute, for I'm looking for them too.
Like polo has mentioned, Inn my wife, NTRPG(and sequels)
Mischief Wars (Itazura Wars)
Amore Magic Academy and Shadowcore (like maddogrd mentioned)
Netorare Imouto Misaki
Dark Elf
To H
Treasure Hunter Mai
(I think, not 100% sure) Mature Quest
I'll get back to you if I remember others (I'm sure there's a few more I forgot)