Aptana Studio is ideal for web developers looking for an open-source, integrated development environment with broad language support and customization options. It is particularly recommended for developers who work on multiple web technologies and prefer having a one-stop solution for their coding, version control, and debugging needs. It is also suitable for those who appreciate the extensibility provided by Eclipse-based IDEs.
MySQL - The world's most popular open source database
Netbeans - NetBeans IDE 7.0. Develop desktop, mobile and web applications with Java, PHP, C/C++ and more. Runs on Windows, Linux, Mac OS X and Solaris. NetBeans IDE is open-source and free.
PostgreSQL - PostgreSQL is a powerful, open source object-relational database system.
Sublime Text - Sublime Text is a sophisticated text editor for code, html and prose - any kind of text file. You'll love the slick user interface and extraordinary features. Fully customizable with macros, and syntax highlighting for most major languages.
SQLite - SQLite Home Page
Notepad++ - A free source code editor which supports several programming languages running under the MS Windows environment.