Inetlab.SMPP Library
Inetlab.SMPP is a .NET implementation of SMPP protocol. This library can communicate with SMSC, send and receive SMS messages. Using the same DLL, you can create SMPP Server/Gateway and provide advanced SMS services to your customers.
It is the most reliable SMPP .NET implementation.
Inetlab.MMS.MM7 Library
Inetlab.MMS.MM7 is a .NET library for sending and receiving MMS messages. It works via Internet and HTTP protocol. The library also supports media extraction, SMIL and IIS.
Advanced and simple to use MMS .NET library.