From MySQL to SkySQL to NewSQL
Apr 29, 2013, 11:00 (0 Talkback[s])
Full Text Search: The Key to Better Natural Language Queries for NoSQL in Node.js
So newsql.sourceforge.net describes NewSQL as a new database access language that is "easier to learn" than SQL. It is not a extension or subset of SQL, and not an o'bject database language.
MariaDB is open source and is compatible with the MySQL database while providing new extensions and features.