ola.hallengren - Alternative MySQL scripts! Having worked with MS SQL for many years and found ola.hallengren scripts incredibly useful - I find my self in a MySQL environment.
Is there a MySQL alternative to ola.hallengren? - Perhaps someone has created a batch of scripts to show worst performing queries, re-indexing jobs etc that is popular in the area of Database optimisation, maintenance etc.
I've reviewed Optimize a MySQL Database using MySQL Workbench - Although useful, doesn't quite give me the flexibility of what I need - that Ola answers with there scripts.
You might like to visit https://github.com/shlomi-noach/awesome-mysql which is a list of recommended community tools for MySQL.
Specifically the kind of tools you want may be:

common_schema - DBA's framework for MySQL, providing a function library, views library and QueryScript interpreter.
sys - A collection of views, functions and procedures to help MySQL administrators get insight in to MySQL Database usage.
Percona Toolkit - a collection of advanced command-line tools to perform a variety of MySQL server and system tasks that are too difficult or complex to perform manually.
openark kit - a set of utilities that solve everyday maintenance tasks, which may be complicated or time consuming to do by hand, written in Python.