development tools

some great tools for web development:

FireBug
awesome Firefox extension with many tools (css,dom,network etc) and the best part- javascript debugger and console.
few minutes ago it showed me an error that i couldn't find for many hours . really a-must thing.

phpDesigner 2008 -

phpDesigner 2008 is the PHP IDE for all your PHP development including support for working with OOP and frameworks in PHP, real and advanced debugging using Xdebug, remote ftp-editing and many other cool features