XAMPP is a free and open source cross-platform web server package, consisting mainly of the Apache HTTP Server, MySQL database, and interpreters for scripts written in the PHP and Perl programming languages.
Liferay Portal is the world's leading enterprise open source portal framework, offering integrated Web publishing and content management, an enterprise service bus and service-oriented architecture, and compatibility with all major IT infrastructure
Microsoft SQL Server Management Studio Express (SSMSE) is a free, easy-to-use graphical management tool for managing SQL Server 2005 Express Edition and SQL Server 2005 Express Edition with Advanced Services. The tool includes both script editors and graphical tools which work with objects and features of the server.
VertrigoServ is a complete PHP development and server environment for Windows. It installs Apache 2.x.x, PHP 5.x.x, MySQL 5.x.x, and PhpMyAdmin, both installing and setting up the environment. An uninstaller allows you to remove Vertrigo from hard disc. Vertrigo is a freeware compilation of free software (under GPL, Apache License). Main aplication has closed source code.
SQLyog Community Edition is a front end for the MySQL database server. The program is aimed at users that are familiar with SQL statements and need an easy to use, no fuss, graphical interface to execute SQL queries, manage users and permissions, edit table properties and more.
SQL Server 2008 Express Edition is a free, easy-to-use, lightweight, and embeddable version of SQL Server 2008. Free to download, free to redistribute, free to embed, and easy for new developers to use immediately.