http://www.spiderwebsoftware.com/products.html is a charming little company that's been producing traditional (if a bit old-fashioned) role-playing games since when I was a wee lad. Have a look at their products. I remember playing the Exile series until well into the small hours as a kid, but they've evolved since then, making newer and more polished games as time goes on. They're technically only free as demos, but the demos themselves tend to be long enough for you to have hours of enjoyment.
I play alot of Flash RPG games, and one in particular that is keeping me in interest is Arcuz- Behind the Dark I just also discovered TCT RPG recently.
Errr... pretty sure the OP asked "no browser games".