http://MartianGames.com has been accepting and encouraging awesome Unity3D content since its inception! 
7a
22
I was looking for Unity games distribution service like Mochi or FGD and googled to this thread. Sorry for the first post with self promotion and I think it could be useful for developers here.
We’ve added support for Unity Web Player games several month ago, so welcome to upload games here: eplusgames.net/games/upload
Thanks in advance, have an amazing day
#gamedev
Have you tried izombiegames.com? You can find several examples.
http://www.smashgamez.com accepts unity. Take a look 
bjohyea
25
[link text][1]
[1]: http://www.unity3dgames.net/ also accepts unity games
www.crazygames.com also accepts Unity Games, you can contact us via Contact us - CrazyGames
If you have your own website but can’t publish it there: my webhoster doesn’t support unity (yet) but I can publish anything by changing the file extension to something different (say .jpg) and edit the html accordingly.
mrland
29
http://apkearn.com/ also accepts unity games.
Game bucket also accepts unity projects on the web.
I would like to recommend you to www.FREEGAMES66.com . They accept Unity games as well as HTML5 and flash games. I’ve worked with them for quite a while and they are quite good. You can contact them through admin@freegames66.com
I hope that it is of use to you.
check also this site unity io games also accepts unity games.