MySQL and its affiliates or derivative versions

MariaDB

MariaDB is a MySQL branch version that uses the Maria storage engine and is a free, open source database server developed by a company founded by the original MySQL author Michael Widenius.

Spider in MariaDB
Kentoku Shiba
Slides:Spider_in_MariaDB_20140403.pdf

MariaDB 10.0 Optimizer
Sergey Petrunia and Sergei Golubchik, MariaDB developers
Slides:mariadb-10_0-optimizer-apr2014.pdf

MariaDB and Scaledb Showcase
Moshe Shadmon, Scaledb
Show case about to insert continuously 1 Million rows/second while doing concurrent reads with MariaDB and Scaledb
Slides:scaledb-2014-v4.pptx

Vitess, CAP, and hitting the sweet spot @YouTube
Sugu Sougoumarane, Google
Slides:Vitess_and_CAP.pdf

Big data with NEO (distributed database powered by MariaDB) and Scikit-learn
Jean-paul Smets, Nexedi
Slides:nxd-wendelin.presentation.mariadb-005-en.pdf

Detail in https://mariadb.org/en/community-events/2014-04-santa-clara/

MySQL Enhanced version Percona Server

Percona has improved MySQL database server, with a significant increase in functionality and performance compared to MySQL.

http://www.mysqlperformanceblog.com/