I have a portal at html5haven.com. I'm a GameMaker user, but I'm happy to accept HTML5 games regardless of engine used.
Unlike some of the other portals, all games on HTML5 Haven are hosted on-site (rather than linking), and the author is credited with a link to their site.
If you're making games for mobile, there is also a mobile section at html5haven.com/mobile
If you want to submit your game, then you can contact me from the contact page: html5haven.com/contact