SMS-it
SMS-it! allows you to send a short message (SMS Short Message Service) to a mobile phone using your computer. SMS-it supports Picture messages, Caller Group Graphic, Operator Logo, Ringtones and Flash SMS. The messages can be sent through an attached modem, through an internet connection or... The phonebook can also be downloaded and synchronized with SMS-it!. ... The Integration with MS Outlook is possible. ... If a mobile phone is attached to the computer (IE through the IR port), the contents of the inbox can be downloaded and stored in folders.
http://www.mawnet.com/sms-it.zip - 4Mb - Download - Screenshot

FastSMS III
FastSMS III is a simple, reliable tool for Short Message Service (SMS). This program sends text messages to the cell phones of any subscribers whose providers support the service. It has an exclusive and easy-to-manage interface adapted to SMS standards and offers you more extended features for... Using FastSMS III you do not depend on any SMS centers, sites or SMS gates, so it increases your message confidentiality and saves your time and money. ... You can send an unlimited number of free SMS messages, with no limitations on the number of characters!
http://simpleforce.net/fastsms/fsms33.zip - 881Kb - Download - Screenshot

Atelier Web SMS Pro
AWSMS Pro uses the modem already installed on your PC to send GSM SMS messages. You don't need to muddle with cables and infrared devices, you don't even need a cellular phone, the messages are sent directly to a SMSC (Short Message Service Centre) which in turn dispatches them immediately to...
http://evalsoftware.atelierweb.com/awsms10.zip - 1Mb - Download - Screenshot

Group Text Messenger
This is an SMS (Short Message Service) standalone application that allows various groups of users to be sent SMS messages in just one instruction.
http://www.accusoftware.co.uk/downloads/zips/grouptextmessaging.zip - 3Mb - Download - Screenshot

HS GSM SMS C Source Library
HS GSM SMS is a C source library that provides a PC-based user application with access to a mobile phone's Short Message Service (SMS) functionality, according to ETSI standards: GSM 07. 05 (ETS 300 585) - "Use of Data Terminal Equipment - Data Circuit terminating; Equipment (DTE - DCE)... Features: * Interface with mobile phone over COM ports COM1 - COM8 * Sending SMS messages to GSM network * Receiving incoming SMS indications from mobile phone * Reading received SMS messages from mobile phone * Deleting messages from mobile's phone memory * Decoding sender number and service center...
http://www.hillstone-software.com/hs_gsm_sms_demo.exe - 308Kb - Download - Screenshot

SMS Wizard LITE
SMS Wizard is the ultimate software solution for sending short messages (SMS) to pagers and cellular phones. Now it is possible to send your SMS-messages not only via Internet (using SNPP protocol) but and directly from any GSM-compatible mobile phone connected to your PC by serial, infra-red,...
http://www.silmarilsoftware.com/ftp/smswizardint.exe - 5Mb - Download - Screenshot

HSLAB Text2SMS
Program allows to sent SMS (GSM Short Message Service) about any events in your system to yours cellular phones and also allows you always to be well informed about of events descending in your network using free HSLAB system monitoring kit (Admin NT Utilities Set, included in package). ... HSLAB Text2SMS adds in the "Send To"menu item "Mobile Phone As SMS". ... Simple right click on file and select "Send To"->"Mobile Phone As SMS". ... You can send eny text files to the celular phone as SMS. ... You can use command line switches for starting from command line in batch mode or interactively.
http://www.hs-lab.com/Downloads/hslab-text-to-sms.exe - 1Mb - Download - Screenshot

acesms activex
Ace sms ActiveX Control is a great SMS SDK that allows your program Send/receive sms with all Gsm AT Command Set compatible phone/modem from a Windows System. AceSMS ActiveX is based on a widely accepted Technical Specification known as : GSM0705 GSM0340 Digital cellular telecommunications... Nokia: N5110/6110/6150/7110/3210/3310/3330/5510/5210/8210/8250/8850 Siemens:S2588/3508/3518/3518i/3568/3618/6618/6688/2118 Ericsson:T28/T28s/T39m/T68/R380s/GM/GA 12/GM25/T610/F221M/F251M. ... The following table summarises compatibility reports that have been received by users, and does not...
http://www.sinoexam.com/fwcx/tingkeka/libs/acesmsx22.exe - 8Mb - Download - Screenshot

SMSC Relay VCL SDK
SMSC Relay VCL SDK library is a set of optimized VCL components enabling quick creation of applications implementing the communication with the SMSC through TCP/IP protocol. Changes in version 2. 3 - Delphi 2005 and Delphi 2006 compatible. - Stable and well tested vesrion of the components -... - Asynchronous message submit in SMPP protocol (SubmitMessageAsunc function). ... Key features: - Multithreading construction ensures maximum efficiency of the sending and receiving messages process - Receiving messages sent by users to special (short) numbers (contests, surveys, voting services etc.
http://www.tops.com.pl/download/smscr-vcl-2.3.55.exe - 2Mb - Download - Screenshot

SMSC Relay ActiveX SDK
SMSC Relay ActiveX SDK library is a set of optimized ActiveX components enabling quick creation of applications implementing the communication with the SMSC through TCP/IP protocol. Changes in version 2. 3 - Stable and well tested vesrion of the components - accumulates small fixes gathered from... Key features: - Multithreading construction ensures maximum efficiency of the sending and receiving messages process - Receiving messages sent by users to special (short) numbers (contests, surveys, voting services etc.
http://www.tops.com.pl/download/smscr-ax-2.3.55.exe - 2Mb - Download - Screenshot