Sometimes websites have so much on them we miss some of the resources. Widgit Software (UK), the producer and distributor of a variety of special needs software packages is one of those sites. Symbol World seems to be a resource most people know about, if you don't you should definitely check it out.
There is more to be discovered however, like the ten free symbol stories you can download (some fairy tales and some mythology), the fun activity packs and the cross curricular packs (most of which are free). Also there are a broad range of resources avaliable at the Symbol Inclusion Project.