Yes, BlockMason is a great project, advisory board includes Anthony Di Lorio (co-founder of Ethereum), Richard Kastelein, and they have a very strong team and vision as well. Very low Mcap right now, I think about $100m or so, they are definitely a top 20.. https://blockmason.io
Also check out ArabianChain (http://www.arabianchain.org), Ubiq (https://ubiqsmart.com), BlockTix (https://blocktix.io), and Rupee (https://rupeeblockchain.org)
All of these have low caps and are huge winners in my opinion. Huge gainers for 2018-2020.