1)   ActiveXperts SMS Messaging Server 4.1
SMS messaging framework for sending, receiving and processing SMS messages. Support for MS Access, MS SQL and MySQL. Support for GSM modems, SMPP service centers, POP3 and SMTP. Use API to process messages and to generate new messages using queries.
SMS, SMPP, GSM, modem, WaveCom, MultiTech, Clickatell, SMSC, FBUS, WAP,

 2)   SMS and Pager Toolkit 4.1
SMS ActiveX Component for Windows, to send and receive SMS messages. Support for GSM modems and SMPP service centers. Samples included for VB, VC/C++, VB .NET, VC# .NET, ASP, ASP .NET, Java, PHP. Product of the Year at http://www.smssolutions.net
SMS, GSM, MMS, SMPP, PDU, TAP, XIO, SMSC, FBus, Nokia,

 3)   SMSC Relay ActiveX SDK 2.3
SMSC Relay ActiveX SDK library is a ActiveX library for SMS/EMS communication with the SMSC through TCP/IP. Protocols SEMA, CIMD2, UCP and SMPP. Send and receive SMS, EMS, logos, ring-tones, 7-bit text, 8-bit binary data and Unicode (UCS2) messages.
smsc, smpp, ucp, sema, cimd, cimd2, sms, ems, smsc relay, activex,

 4)   SMSC Relay VCL SDK 2.3
SMSC Relay VCL SDK library is a VCL library for SMS/EMS communication with the SMSC through TCP/IP. Protocols SEMA, CIMD2, UCP and SMPP. Send and receive SMS, EMS, logos, ring-tones, 7-bit text, 8-bit binary data and Unicode (UCS2) messages.
smsc, smpp, ucp, sema, cimd, cimd2, sms, ems, smsc relay, vcl,

 5)   SMS and MMS Toolkit 5.0
Send and receive SMS messages via a GSM/GPRS modem, HTTP-POST provider or SMPP provider. Send and receive MMS messages via MM1 (GPRS), MM4 (SMTP) or MM7 (XML/SOAP). Samples for VB, VC++, VB.NET, VC#.NET, ASP, ASP .NET, Javascript, PHP and more
SMS, GSM, MMS, SMPP, PDU, TAP, XIO, SMSC, GPRS, UMTS,