I just want to know if there is a free sms messaging site where I can send text messages from my computer to a cellular phone in canada.I asked this because I don't have a cellular phone right now.your help is very much appreciated.thank you so much.

Lots.. you could try a Google search.

http://www.google.com/search?sourceid=navclient&ie=UTF-8&rls=GGLD,GGLD:2004-17,GGLD:en&q=free+sms

Log on to"www.Way2sms.com"

Free international SMS is available only through few websites. You should try EZFreeSMS for Free Texting. (http://ezfreesms.com)

Yes there are lots of free SMS messaging providing websites like: sendsmsnow[dot]com
You can try skype as well.