There are several apps available geared toward people with special needs/ communication issues, as well as those geared towards babies/toddlers/prek that work well for kids with special needs.  I have the iPod Touch and iPad, so I'm always on the look out for apps my kids can use. 

 Apple In Education 

Apps for Communication & Speech

~ Proloquo2Go

~ My Talk Tools

~ TapToTalk

~ Look2Learn

~ iCommunicate 

~ AutoVerbal - an affordable option that empowers kids with Autism or any non-verbal user to communicate using hundreds of pictures as well as text-entry for text-to-speech.  The app is Universal (runs on iPad, iPhone, and iPod touch) and Spanish and French versions are available.

~ ArtikPix 

~ Dragon Dictation 

~ AACSpeechBuddy 

~ Grace 

~ Predictable 

~ iComm 

~ ChoiceBoard Maker  

~ Locabulary  - communicate words, phrases, and sentences.

~ iConverse - Converse gives users the ability to carry an AAC device in their pocket creating a means of communication that is appropriate, effective and discreet.

~ iPrompts - picture-based prompting app

~ iSpeech -  tool for teaching and practicing speech therapy at home. 

~ Pocket SLP Articulation - over 2,100 high-quality flashcards targeting both the word and sentence levels- immediate auditory feedback, and are tacitly involved as they push buttons and/or swipe their way through the images.

~ Learn To Talk - uses both sight and sounds to teach toddlers basic vocabulary and early language skills.

~ TapSpeak Button 

~ Voice4U - helps individuals to express their feeling, thought, actions and things they need.

~ OneVoice 

~ Answers:YesNo

~ iMean 

~ EZ Speech 

~ Expressionist 

~ HaloTalk 

~ iPACS

~ TouchChat

~ SoundingBoard  

~ iAssist Communicator 

~ SmallTalk 

~ Talk iPhone 

~ Talk Assist - anything you type in will be spoken out loud for others to hear. Phrases will be saved to a history, and favorite phrases can be bookmarked for regular use.

~ Locabulary - uses the iPhone to communicate words, phrases, and sentences.

~ SpeakingUp 

~ TapSpeak Sequence

~ TapSpeak Choice - complete communication board editor and player.

~ Food Cards 

~ Assistive Chat

~ Expressive 

~ Talk For Me

~ PictureCanTalk 

~ Articulate It  

~ SLP Mobile Articulation Probes - for children with articulation difficulties. 

~ Speech With Milo- Verbs

~ Speech With Milo- Prepositions  

~ Talk To Me - Text to speech

~ Text2Speech 

~ Speak It Text To Speech 

~ Sign 4 Me - sign language instruction in 3D

~ Sign Smith ASL Ultimate - the SigningAvatar® characters show you how to sign the ASL Alphabet, count, communicate at work, at school and anywhere! More than 1,200 signs.

~ ASL Dictionary

~ Signing Time ASL Flashcards - 145 professional quality flash cards

~ Signing Time ASL  

~ iSpeech Toddler Sign Language - The included signs will assist children with developmental delays or children who are too young to articulate words to communicate with the people around them. 

~ In My Dreams - Have fun with reading, matching, and sign language. Uses animation and repetition to promote literacy.

Apps for behavior, schedules, social cues, etc

~ I Earned That 

~ iReward - motivation chart for your iPhone, iPod Touch, or iPad.

~ iReward Chart

~ TASCU Schedule - simple, picture-based schedule application for iPhone/iPod touch, especially for small children to easily create his/her own daily time-table by using image cards with sounds & voices attached.

~ VolaFriends - facial expressions 

~ Eye Contact 

~ iTouchiLean Musical Morning Routines 

~ Off We Go 

~ AutismXpress - (this one is kind of strange & though it says Autism, I don't see it. I debated listing it, but it's silly & my daughter likes it, so I included it)

~ First Then Visual Schedule

~ Autism Timer - digital timer that shows the elapsed time clearly

~ iDress for Weather

~ SmartCharts -  tool for parents and teachers to track, reward and reinforce positive behaviors, chores and responsibilities for kids.

~ Model Me Going Places - visual teaching tool for helping your child learn to navigate challenging locations in the community.  

~ Visules  

~ Turn Taker

~ Smile at Me