Are you looking for something you can access online, rather than ordering a CD ROM? I think most products will be something you need to order rather than something you can access online. If time/cost is an issue with ordering a CD, you can check if there are any special ed libraries in your area. I've gotten Earobics from our county's SE library and I know they have several other programs.
Super Duper Publications has a series of "HearBuilder" Programs. These are CD ROMS, but they have online demos available for each one:
http://www.superduperinc.com/search/search.aspx
Pick one and then go to "Try it out" to get an interactive sample of the games. I don't know if the demos will have enough material for you to do a full critique, it depends on the requirements of your assignment.
Another option is to look at apps, which are becoming very popular.
Super Duper Pubs has apps for both iPhone/iPad and Android available. Many of them are illustrated/interactive versions of their Fun Decks:
http://www.superduperinc.com/apps/apple.aspx
http://www.superduperinc.com/apps/android.aspx
Mobile Education Store makes wonderful ;anguge/communication learning apps for the iPhone/iPad. We have the iPad versions of most of them and they have helped DS a lot:
http://mobile-educationstore.com/ipad-apps
We have several other language/communication apps too, but the one from Mobile Education are our favorites.
I hope that helps!
Gena
DS, age 11 and always amazing
“Autistics are the ultimate square pegs, and the problem with pounding a square peg into a round hole is not that the hammering is hard work. It's that you're destroying the peg." - Paul Collins, Not Even Wrong