I also know one exchange that is voting for a free listing. Here is the link:
https://www.hadax.com/vote/ I hope this helps the XDNA project!
it's good but I look at it and I do not see votes from the XDNA currency, apart I think the only 2 parts where they were doing good XDNA votes, were:
1: Shartax
2: txbit.io/Coin