http://sms.totalise.net/(english) http://www.clubnautilus.net/areariservata/sms.asp (italian)
http://members.tripod.com/~marcoswede/smsfr.html

http://www.worldxs.net/sms.html

http://www.vdheyden.demon.nl/sms/index1.htm

(Good Portal) ---------------------------
World http://www.mtnsms.com,http://www.quios.com,http://www.sms-kostenlos.de,
http://www.aircall.ch (A Swiss-based SMS service. Sends worldwide, really fast.)
http://www.mtnsms.com, MTN*SMS (Mobile Telephone Network. Worldwide, does not support all networks.)
http://www.quios.com (Quios Messenger. Worldwide, and some extra services.)
http://www.mybegin.com (My Begin: A SMS service based in Holland. Unlimited and pretty good.)
http://www.detelefoongids.nl/wit/scripts/sendsms.dll ( De Telefoon gids: Dutch SMS service, all networks)

EUROPE
UK:
http://www.vdheyden.demon.nl/sms
Germany: http://www.gsmsite.de/SMS.html Contains all the german SMS sites.
And also on lycos http://www.lycos.de/service/sms/eingabe.html.
A fw others: http://195.27.253.2/sms1u.shtml,http://www2.vector.de/free.asp
http://www.pcteam.de/doc/isp4.cgi,
http://www.telebesked.dk/de,http://www.sms.to

France:
http://www.smsgratuit.com,http://stm.tj/sms/,http://www.cerclo.com
http://www.b-gsm.com/sms.cfm (France or Belgium)
http://www., http://www. , http://www.

Italy:
http://www.sms.it/, http://www.freesms.net/
Swiss:
http://www.moon.ch/sms/free/main-tmp.cfm (Moon.ch: Swiss SMS service)