Yesterday, I recommended Hey Tell for those who want to be able to talk instead of messaging. Today I am recommending Koka Talk for those who want who keep with messaging, but want to do it for free. Kokao Talk allows you to quickly message your friends, share videos or send pics. In short, it is just like SMS, but for free.
Best of all, Kokao Talk is cross platform, allowing friends from iOS and android to be able to converse freely. Check it out, add a few friends, and stop paying for your SMS's. Add me @jagarfull if you want to have a chat!
In the words of the developer:
KakaoTalk, the ultimate smartphone messenger