send sms without registration is not possible at all by these days
DON'T SPEND YOUR TIME for searching this.
here I'm listing out some of the site from there you can register and start send sms to all over India,Gulf countries and world.
www.160by2.com/
www.sendsmsnow.com/
www.way2sms.com/
www.sendgroupsms.com/
www.mtnsms.com/
www.sendsms.com/
www.freebiesms.co.uk/
www.text4free.net/
and many more...
