So you're a Web application developer? Developing in Perl, Python, PHP, Ruby or javascript? Are you a Linux, Mac or Windows user? No matter what your choices are, the answer is ActiveState's Komodo IDE, an impressive cross-platform and cross-language environment for building Web applications. And oh yeah, it's a really great tool that makes working in all these languages a breeze.

Multi-language editor
Multi-language support

Advanced support for:
- Browser-side technologies: CSS, HTML, javascript, and XML
- Server-side languages: Perl, PHP, Python, Ruby, and Tcl
- Web template languages: RHTML, Template-Toolkit, HTML-Smarty, and Django
- Autocomplete and calltips
- Write code faster and shorten the learning curve with code completion that guides you as you work
- CSS, HTML, javascript, Perl, PHP, Python, Ruby, Tcl, XML, and XSLT.
- Schema-based XML/HTML completion
- Multiple-language file support, such as CSS and javascript completion in HTML
- Framework support for Rails and Zend
- Support for adding third-party libraries
- Interpreter version differentiation of built-in and standard library information

Homepage - http://www.activestate.com/