My First AAC by Injini:

https://itunes.apple.com/us/app/my-first-aac-by-injini/id462678851?mt=8

Avaz Lite:

https://itunes.apple.com/us/app/avaz-help-kids-autism-speak/id909574843?mt=8

Sonoflex Lite:

https://itunes.apple.com/us/app/sono-flex-lite/id463709444?mt=8

Go Talk:

http://www.attainmentcompany.com/gotalk-9

Talking Pocket:

http://www.mayer-johnson.com/category/assistive-technology/aac-low-tech/talking-pocket

Talkbook 4:

http://www.mayer-johnson.com/category/assistive-technology/aac-low-tech/talkbook-four