A high performance daemon that sits between your client and MySQL server(s) that can monitor, analyze or transform their communication. Written with a modular, threaded structure, you can write plugins to convert queries, update/modify result sets, redirect traffic, automatically shard, anything you want.
Diamond is a python daemon that collects system metrics and publishes them to Graphite (and others). It is capable of collecting cpu, memory, network, i/o, load and disk metrics. Additionally, it features an API for implementing custom collectors for gathering metrics from almost any source.
An advanced, but easy to install, ui for pt-query-digest or mk-query-digest.
MythWeb provides a frontend for scheduling and managing recordings on your MythBox from a web browser located on another machine.
An intensive one-day workshop for MySQL database administrators and systems administrators that covers InnoDB and XtraDB, the most popular storage engines for MySQL.