ActiveXperts SMS and Pager Toolkit - Adding SMS and Pager capabilities to an application is not a simple matter.

PopupAlert allows you to display popup alerts similar to those used in Microsoft® Windows Messenger and Office 2003, using a variety of different styles.

Social Bookmarking ActiveX Component is a free ActiveX component (DLL) that can be used in any programming language that supports ActiveX

FAXASP allows VB or ASP/ASP.NET developers to send faxes over the Internet .

SMSC Connectivity SDK accelerates the development of custom SMS and EMS messaging applications.

SmartCell - Send and receive SMS messages using GSM Modem

RFax - Now you can send and receive faxes from your .NET application. RFax is a native.NET component completely developed in c# that will do this job for you with only a few lines of code.