Understand - Combines a powerful Code Editor together with an impressive array of static analysis tools that will change the way you work with code.
WPMU DEV - WPMU offers WordPress Plugins, WordPress Themes, WordPress Multisite and BuddyPress Plugins and Themes.
Source Insight - Source Insight is a programming editor & code browser with built-in live analysis for C/C++, C#, Java, and more; helping you understand large projects.
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).
Sourcetrail - Sourcetrail is a cross-platform source explorer for C/C++ and Java.
Firefox Developer Edition - Built for those who build the Web. The only browser made for developers.