NetBeans 7.2 : Dreamweaver in Linux and more.

This is an amazingly powerful tool that equally powerful to work as a platform framework for Java desktop applications and as an IDE (integrated development environment) while developing something with PHP, JavaScript, Scala, Clojure, C, C++, Groovy, Ruby, Python and many more.

The NetBeans IDE runs virtually anywhere given the fact that a JVM is installed. It is developed in Java. You can download it here: http://netbeans.org/downloads

I recommend Net-beans 7.2

Codeigniter is best!!!

CodeIgniter is a powerful PHP framework with a very small footprint, built for PHP coders who need a simple and elegant toolkit to create full-featured web applications. If you’re a developer who lives in the real world of shared hosting accounts and clients with deadlines, and if you’re tired of ponderously large and thoroughly undocumented frameworks, then CodeIgniter might be a good fit.

Pros :

1. Zero configuration.
2. No need of shell access.
3. Simple
4. Extensible
5. Clear, thorough documentation.