Shardeum seems to be a promising blockchain, allowing thousands of normal users to be validators and having sharding features. It's also backed by a big exchange, WazirX, which adds credibility to its project.

Q Blockchain seems to be a well-developed blockchain with EVM compatibility and a legal document called the "constitution" built into the protocol to protect users and enable root nodes to monitor and control validators.

I think the built-in synthetic assets like USD, stocks and Gold make Q Blockchain unique and interesting. It's great to know that you can get the aforementioned coins and Q before it lists on an exchange by performing simple bounty tasks on Zealy.