For decentralized exchanges, almost all of them are easy to get listed on. As for centralized exchanges even though some of them don't ask you to pay any fees, you'll find a hard time doing it unless you have a use case for the coin and also a strong user base.
That's true if you are a developer and had a good platform and you have a big and large community, it will have a good chance to get listed, this is the reason why IEO is having a huge success because they are already listed in a big exchange and you will not have to hope it get listed just like when you are investing in IEO, where the chances to get listed in big exchange is very slim.
