clipped from: mashable.com 
Sometimes you need to send a text message, but you forgot your phone, or you have poor cell reception, so what can you do? Or you just prefer the comfort of the full keyboard to the crammed one on your phone? No problem, we’ve got 10 sites to help you get started with staying in constant contact with your friends, families and even your customers.
Bloove.com - Get your phone contacts on the Bloove site, and then log in and manage them as well as send them text messages directly from the site.
Group2Call.com - Allows you to import your contacts, break them up into groups and send all the free texts you want to them. Also offers the chance to broadcast voice messages, but you have a limited supply of those.
OhDontForget.com - Not only can you text people, you can schedule them for later delivery.
