I have discovered more picture symbol systems to share with you all. The first is the Bonnington Symbol System out of Edinburg, Scotland. They currently have 600 symbols with plans to expand. They also offer a variety of free symbol based activities. The Bonnington Symbols are ment to expand other symbol systems and are compatiable with MS Word and Boardmaker. There list of links is worth checking out.
The Simplified Sign Lexicon now has a library of 800 free black and white images of American Sign Language words to be used when working with learners who have intellectual disabilities. The dictionary is arranged in alphabetical order. There is also a teaching manual, and everything is free of charge.
Tangible Symbols Systems offers texture, miniature objects and partial objects. They have many resources to be explored.
There are two companies making customized cards Squarepics and Goosie Cards. Both are worth taking a look at.