If the ICO doesn't accept coins other than only BTC, LTC, ETH please don't share it here.
It doesn’t have features that I would want to use so I wouldn’t recommend anyone investing in them. It seems like the only investments that are accepting an Altcoin other that the ones noted is mainly Waves. There used to be a few projects accepting coins for a swap without relying on an escrow though they aren’t doing so well nowadays.
If Waves isn’t what you want then I can’t really help you since I’ve only did a quick look and found those coins. If you find any other ones then they may not be worth money.
Kandern: https://bitcointalksearch.org/topic/annicowaves-token-kandern-a-town-a-coin-2097094
WorldTurtleCoin: https://bitcointalksearch.org/topic/annico-worldturtlecoin-a-modern-day-mud-experience-waves-token-2159922