WPMU DEV - WPMU offers WordPress Plugins, WordPress Themes, WordPress Multisite and BuddyPress Plugins and Themes.
VisualVM - VisualVM is a visual tool integrating several commandline JDK tools and lightweight profiling...
Firefox Developer Edition - Built for those who build the Web. The only browser made for developers.
ANTS Memory Profiler - ANTS Memory Profiler is a .
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).
JConsole - Provides information about performance and resource consumption for Java applications.