Frei Exchange seems open to new coins with real development. The AXE network and wallets have to be entirely secure and stable though, so ensure this first before applying.  I haven't been on the AXE network lately, but I wouldn't think that is an issue.

I've traded some coins on Frei and the dev is very active and committed.

Keep up the development work and commits on AXE Charlie and time will reward you and the community!