WPMU DEV - WPMU offers WordPress Plugins, WordPress Themes, WordPress Multisite and BuddyPress Plugins and Themes.
Python - Python is a clear and powerful object-oriented programming language, comparable to Perl, Ruby, Scheme, or Java.
MAMP - MAMP is the abbreviation for Macintosh, Apache, MySQL, and PHP. It is a reliable application with its four components that allows you to access the local PHP server as well as the database server (SQL).
Java - A concurrent, class-based, object-oriented, language specifically designed to have as few implementation dependencies as possible
Firefox Developer Edition - Built for those who build the Web. The only browser made for developers.
Rust - A safe, concurrent, practical language