Site has free demos of most games.
winterwolves.com/I have to admit I am a fan of this group's work. At least some of it.
The visual novel section tends to lean towards romance which isn't really my cup of tea but three games of theirs are actual rpgs.
Loren the Amazon Princess. A bit silly on some of the costume designs (I highly recommend leaving it on the "censored version") The game never gets into anything graphic as far as "adult" situations go, but it spares most of the silly cheesecake/beefcake artwork.
Planet Strong hold.
Probably the weakest of the three games. Still enjoyable.
Season's of the Wolf.
My favorite of the bunch. It is set in the same world as Loren above, but manages to significantly reduce the cheese cake/beekcake imagery and provides a solid story.
I will not lie this is one of the few games I have played that managed to almost elicit an emotional response from me.