CamDesk is a free, open source, desktop webcam widget, that was created as home surveillance application. Although others have used it for demonstrations even with CamStudio, and QuickTime Player for screen casting.
DownRoll: The downloadable RickRoll. How many people can you fool? Instructions: 1. Download it. 2. Change the file name. 3. Upload it to a file sharing site. 4. Trick people into running it.
Snarfzilla was a GUI and web browser for the official Freenet Java server.
The first web browser for the dark web.
It hasn't been compatible with Freenet for several years and development ceased.