List of free SMS gateways all over the world.

USA & Canada
AirTouch Messaging
AirTouch Paging
Ameritech Paging
Arch Paging
AT&T Wireless Services
Bell Mobility
Bell Atlantic Mobile
Cikis SMS
MessageX Paging
MessageX PCS
MCI paging
MTN SMS
Omnipoint Network
Pacific Bell PCS
PageMart paging
Page-Me.com
PrimeCo Text Messaging
Rogers Communications
Sprint PCS

Iridium Satellite Phones & Pagers
Iridium

Germany
D1 De TeMobil
Vector SMS
3BoxBeyond the net
Net-iT Now SMS
Branchenbuch Online SMS
MTN SMS
D2 Mannesmann Mobilefunk [+49 - 172/173]
Vector SMS
Interactive Networx
Branchenbuch Online SMS
E-PlusE-mail (ePlus)
E-mail (Mobilis)

New Zealand
MTN SMS

Hungary
MTN SMSQuiosEmail (Pannon only)

Indonesia
Pandawa SMS
MTN SMS

Luxembourg
MTN SMS

Ireland
MTN SMS

Turkey
MTN SMS
Free Street

Romania
Codec SMS
Radiotel SMS
MTN SMS
Quios

Italy
wikeyfun.com
Blu.itFree Street
SMS.it
GSM BOX
MTN SMS
Javaro Net SMS
WappyJumpy
CiaoWEB
Quios
KataWEB
E-mail (Ominitel user only)

Andorra
STA-Mobiland

Azerbaijan
MTN SMS

Indonesia
MTN SMS

United Kingdom
eMobile
Genie (Cellnet user only)
MTN SMS
Locust
Orange messaging
Orange E-mail

Finland
MTN SMS
Branchenbuch Online SMS
Radiolinja

Tanzania
Branchenbuch Online SMS
MTN SMS

Philippines
OmniTEXT