There are some exchanges that instead asking for payment to list your token, they will list some tokens and then their community can vote and decide which coin will be listed, it is basically free. But, trust me if you want to win the voting you will need to spend some money so the community will vote for your coin. Otherwise if your coin is a token run on some platform like Ethereum, Waves, or Stellar, there are some Decentralize Exchange that will list your coin freely.