It might have happened that you wanted to hear the message and who sent it rather than having to read it. Say a message pops up while you are driving or if its too dark or you forgot your reading glasses.Or maybe, if reading the earlier SMSes took you down the memory lane, so imagine what will happen if there is an app that speaks those text messages instead of you reading them.
This app allows you to select a particular received message, which u can do so either by scrolling or searching, and then reads it out for you!
Note: The app might take some time to load depending upon the size of your inbox.
Also you can adjust the speed of speech by going to your device's Settings >under Speech- Text-to-speech output >Speech rate (For JellyBean)

Screenshots: