As far as adding previews to the downloads, its a nice idea but I don't have the time to go through and take pictures of all of them. If you guys want to take pictures, I can add them but if we're going to go that route than we should try to standardize the appearance/size of them.
The bot exchange will have preview images when I finally decide to finish it. Goose had preview images working on his version of the bot exchange before everything got deleted when ACAMS lost his computer. After waiting a couple years for Goose to make a replacement, ACAMS made a temporary bot exchange based on the code that Goose used for the file uploader. For the most part, this is what you are seeing today (with a few of minor enhancements of my own).