Most of these are fairly trivial applications, but they do the job, and might save you some time, or give you a hint on one approach to a problem.
But how?
Emails get spam-boxed and letters won't get opened for fear of anthrax.
Postcards are safe and don't go into spam boxes.
This application will print four double-sided postcards on a sheet of paper, with addresses on one side and message on the back.
This tool makes it eash to create customized control panels for the BottleRocket X-10 Controller.