The event notification mechanism includes server and client components. An event can be posted by MS SQL Server using the server component the xp_messenger extended stored procedure. The extended stored procedure to broadcast event messages to interested client applications. A client application can get messages using a client component. This component is the Sql_messenger ActiveX control. The control allows client application to receive messages for specific event. You can easy build much more sophisticated applications or services using these components. Now, in awaiting some critical data or events an application does not need to query SQL Server repeatedly. The SQL Server will notify an application when the data came or event happend.

• ABCEventLog 1.0
  Adding events to the Application Event Log is as simple as ABC with ABCEventLog. The only component to support multiple event types, event sources and both local and remote event...

• dOPC 1.4
  This easy to use Component enables to control, browse, read and write data, from any installed OPC Data Access 1

• SSH Factory 3.7
  Java SSH and Java telnet client components for communicating with SSH and telnet servers.

• EBA:FTP Sync 1.
  The FTP Sync component is an ActiveX Component that provides a simple interface for synchronizing files and folders between a client and a server running an FTP Service

• .NET SMTP Component for CS VB.NET ASP.NET 2.0.420.16
  The Ultimate SMTP component is a part of the Mail Component which offers a comprehensive interface for composing and sending e-mails directly to recipients or via SMTP server, all from within your application. In addition, it also allows you to decrypt, encrypt, sign, and validate email messages. * Features * Sending email messages...

• .NET SMTP Component in CS VB.NET ASP.NET 2.0
  The Ultimate SMTP component is a part of the Mail Component which offers a comprehensive interface for composing and sending e-mails directly to recipients or via SMTP server, all from within your application