As mentioned by both Sean Coates and the International PHP Magazine, ActiveState has release the latest version of their popular development environment - Komodo IDE 4.0.
Komodo IDE 4.0 is the first unified workspace for end-to-end development of dynamic web applications. A rich feature set for client-side Ajax languages such as CSS, HTML, JavaScript and XML, coupled with advanced support for dynamic languages such as Perl, PHP, Python, Ruby and Tcl, enables developers to quickly and easily create robust web apps.
Komodo is all about simplicity and helping you write your code. This includes features like a multi-language editor, integrating sharing abilities, the ability to create Firefox-like extensions to add to other applications, and full customization settings to make your worspace your own.
Find out more about the software on Komodo's page or just head over and buy this latest version for a discounted rate of $245 USD. There's also a trial copy you can download and check out before spending the cash.