A few new-ish games I see haven't made this list yet... just in case there's other people that still check in around here, or *only* check in here.
Pornarium: actually been in development for a year or two, it takes a lot of inspiration for Corruption of Champions. Lots of transformations, some wierd stuff, but by CoC standards almost bland. Pretty good design, it's worth a look.
http://pornarium.blogspot.com/?zx=c2a7afb5a4a5b877 Fetish Master: Not a *whole* lot here yet, but a nice basic design is set up for a mind controlling, developmental type game. If the coder sticks with it, should be pretty good. If you want more than twenty minutes of actual game, skip. (note: link is to Futanari Palace, but no actual futa is in this one to my knowledge)
https://www.futanaripalace.com/showthread.php?48246-Fetish-Master-new-game-(stable-alpha)
Lucky Survivor: Again, a game inspired by Slavemaker and Whoremaster (!) - but on an island, and probably with transformational elements. Somewhat further along in development than the above FM, but far from a complete game. If you want more than forty minutes of actual game, skip. (note: again, it's on Futanari Palace but with no futa as of yet)
https://www.futanaripalace.com/showthread.php?43385-WIP-Lucky-Survivor Cursed: RAGS! Yet another game with transformational elements, this one is probably as old as WM. The programmer is still slowly working on it, but what's here is quite playable and enjoyable. Definately worth the download.
http://anonymousmangames.blogspot.com/?zx=a945830e9df1d012 Tales of the Drunken Cowboy: Also RAGS! Except in space, and with a kickass name! Lots here, more than I've managed to explore. A good choice if TF or futa is a deal-breaker, to my knowledge all that's in here is mind-control (and a pretty tame version, at that). Complete recommendation. (note: the author has a couple of older games on his blog as well, they're both decent too)
http://mdqpgames.blogspot.com/ Other general recommendations for anyone else hunting down games out there:
The Futanari Palace forums are, well, weird (futa guys can be scary), BUT their game development section is quite active. Several of the games there have no futa, and many of the rest have very ignorable futa (like, for instance, Slavemaker). Lots of RPGMaker games, a couple of WM/SM self-coded games, all in various stages of development.
The TFGamesSite.com forums and Hypnopics-Collective.net forums are basically the only two places to find new RAGS games. I, personally, like AIF games - and the newer ones are less railroad, more RPG - and for the last year RAGS is basically the only engine with new for adult interactive fiction in development. A Google search for AIF can get you the older stuff, some of which is awesome (look up GoblinBoy's stuff on TADS especially), but the RAGS engine has basically destroyed everyone else right now.
Finally, for anyone who is immune to the Uncanny Valley, there's arianeb.com (i.e. Virtually Date Ariane) and shark's-lagoon.fr. 3D modeling at it's... finest. I'm probably not giving credit where it's due (Ariane has quite a bit of variety), but judge for yourself. The shark's lagoon forums link to a lot of other 3D modeling games, most of them like Ariane (just without the impressive breadth of game), along with a some browser-based stuff.
Finally the second time, there's the adult games on newgrounds. I feel like there should be a larger niche for flash games, but apparently I'm wrong since basically every game there is a decade old. Of course, 'old' does not necessarily imply 'bad', but with few exceptions they all suck. I mean, SimGirl is still the best one there, and that's the bitter old grandmother of all graphical adult games out there!
Finally the final time, the best advice is still to check every connecting link on every site you find. There's a lot of overlap, but occasionally there's a diamond in the rough. There are games on this list I haven't been able to find anywhere else, which is why I still bother to come back with new updates occasionally.