SQL Server 2005 Notification Services helps you develop and deploy scalable applications that can deliver personalized, timely information updates to a variety of connected and mobile devices.
Microsoft SQL Server 2005 Service Broker helps developers build scalable, secure database applications. This new technology, a part of the Database Engine, provides a message-based communication platform that enables independent application components to perform as a functioning whole. Service Broker includes infrastructure for asynchronous programming that can be used for applications within a single database or a single instance as well as for distributed applications.
Microsoft SQL Server 2005 contains the functionality you need to issue full-text queries against plain character-based data in SQL Server tables. Full-text queries can include words and phrases, or multiple forms of a word or phrase.
SQL Server Express Edition
Microsoft SQL Server 2005 Express Edition is a free, easy-to-use, and robust database engine that is ideal for building data-driven applications and Web sites.
SQL Server Compact Edition
Microsoft SQL Server 2005 Compact Edition is the compact database for rapidly developing line-of-business and personal information management applications that extend enterprise data management capabilities to smart devices.