It's mostly the decentralized exchange that accept free listing but don't expect them to list every submission you make.
1. IDEX: https://docs.google.com/forms/d/e/1FAIpQLSfzF_NTscqqK4TPuJQixe4tZCEJHDVJdTLvNelb_V2D582RVg/viewform
2. Radar Relay: https://medium.com/radarrelay/radar-relay-regulatory-strategy-9da29a9e59cb (read the end) You'll have to contact them.
3. BarterDex: https://komodoplatform.atlassian.net/wiki/spaces/KPSD/pages/225738753/How+to+submit+new+ERC20+Tokens+in+BarterDEX
Trading in these exchanges is also interesting. And I think it's not suitable for beginners.1. IDEX: https://docs.google.com/forms/d/e/1FAIpQLSfzF_NTscqqK4TPuJQixe4tZCEJHDVJdTLvNelb_V2D582RVg/viewform
2. Radar Relay: https://medium.com/radarrelay/radar-relay-regulatory-strategy-9da29a9e59cb (read the end) You'll have to contact them.
3. BarterDex: https://komodoplatform.atlassian.net/wiki/spaces/KPSD/pages/225738753/How+to+submit+new+ERC20+Tokens+in+BarterDEX
Well, you can't have both, I guess. If an exchange has special features or is convenient for beginners, someone needs to program and maintain it. Someone else has to pay for it and that's usually what the listing fees are used for. If you want 24/7 support there is no way to get that for free.
