cloc counts blank lines, comment lines, and physical lines of source code in many programming languages.

Stack trace visualizer

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

Nginx Tutorials

An open-source digital image forensic toolset

The Active Monitoring System

Golang - Regular Expression Tutorial

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

Contributed stuff for munin (plugins, tools, etc...)

A realtime terminal-based top-like monitor for MySQL

Change the urxvt font size on the fly

Deprecated tools from HackMySQL.com

Utilities for nginx module development

Utility functions for working with IP addresses in Openresty

Arbitrary text completion for urxvt. MAINTAINER NEEDED

Fetch nginx variable by FFI way for OpenResty which is faster