Voted for StemQ (https://www.stemq.io/).

stemQ is important to steemSTEM community because it provides more suitable format for content creators. Posts are curated via steemSTEM. And the most important, stemQ can serve as a marketing tool for Steem(it) promotion because the majority of given answers are very comprehensive and worth being on the first page on Google Search.

Recently, stemQ provided a roadmap for its development and looks like sub-community with future.

Regards
AlexS