Hmmm well I purchased Digi-view for my A1000, used that a hell of a lot. Even got the recommended Panasonic black and white security camera and some non-yellow lightbulbs I remember (but then stuck everything in a room with lots of natural light and used it on days with lots of diffuse sunlight). Got an upgrade to Digi-View 4 as well.
Also bought Digi-Paint.
I can't think off the top of my head what else I purchased, I had Deluxe Paint 3 given to me free when I spent about 2000 bucks on my A2000 setup in late 1990.