Unfortunately, we cannot offer "completely free" SMS Gateway, but we
can suggest to have a look at our products:

1) Oxygen SMS Gateway. Provides e-mail <-> SMS , SMS <-> ICQ , e-mail
<-> ICQ data synchronization on standalone server. The trial license
is free. You can read more about Oxygen SMS Gateway here:

http://www.oxygensoftware.co.uk/products/gateway/index.shtml

2) TOxygen SMS Component. You can develop your own SMS Gateway, using
this powerful development tool for Borland C++ Builder and Borland
Delphi. TOxygen SMS Component enables to develop applications for
complete SMS management, i.e., sending, receiving, deleting,
uploading, reading SMS messages. Also you can read battery charge
status and signal level.

You can read more and download free trial license here:

http://www.oxygensoftware.co.uk/products/tsms/index.shtml

3) The most powerful development tool for SMS-based applications is
Oxygen Mobile ActiveX control. Using Oxygen Mobile ActiveX, you can
develop your own SMS-based applications under any environment and
interface, which supports ActiveX. It is irreplaceable tool in
developing web-based SMS Gateways. You can read more and download free
trial license with demo here:

http://www.smsactivex.com/

If you have any questions and/or suggestions, concerning our
program, feel free to post them on our official forum
http://www.opm-2.com/forum/

Best regards, Maxim Vyalkov
Oxygen Phone Manager - all you want from your Nokia
support@oxygensoftware.com
http://www.oxygensoftware.co.uk/
http://www.smsactivex.com/

Hello,

Its not free but PageGate is a really powerful software gateway for sending SMS.
There is a free download to try at http://www.notepage.net/pagegate.htm

All best!

Edward Johns