Well, I'm assuming you mean a simple meet and talk site. I am gay myself, and I used to go to The Gay Youth Corner. It's a great site to meet and talk to other LGBT teens. Check the related links for...
gamesgames.com is a good one go there select multiplayer on the tabs and you might find one you like where you can chat. .
Facebook, it's free and anyone can sign up, you just need an email adress.
Download games bar and find chat. OR go on xat.com/teamgold (just enter your user). HOPE IT helps!
Free chat sites are websites with chat rooms that do not charge their users money.