MySQLTuner is a script written in Perl that will assist you with your MySQL configuration and make recommendations for increased performance and stability.

Development tree of Master High Availability Manager and tools for MySQL (MHA), Manager part

Percona Toolkit: a collection of advanced open source command-line tools.

a filter module which can do both regular expression and fixed string substitutions for nginx

Development tree of Master High Availability Manager and tools for MySQL (MHA), Node (MySQL Server) part

Deprecated tools from HackMySQL.com

awr of MySQL

Summarize hardware present in a Linux system