GO SMS Enhanced Super SMS Uni SMS

Personally, I think Yuni SMS is better to use.

The characteristics of these three softwares are: as long as you install the same software and send messages online, they are all free and only consume traffic.

In addition, the difference of Yuni SMS is that it can send free messages on the Internet and send messages to friends who don't have software installed. At this time, it will cost ordinary text messages.

I hope it helps you.