Which token are you looking for to sell? If ERC-20 based tokens, you may use Etherdelta. It's not exactly user-friendly but it a very good and reliable decentralized exchange which list every kind of ETH-based token.
For Waves-based tokens, you need to wait they are listed on other exchanges.

Anyway, you can look here on coinmarket cap: https://coinmarketcap.com/tokens/views/all/
Click on the token you wanna sell and then on "markets". You will find a list of all exchanges which list such tokens...