Printer Plus is an ingenious and evil joke (of doubtful taste) whose main aim is to start printing worksheets via the printer every so often.
Thus, a new worksheet will be printed out after this interval passes, totally disconcerting the poor user of that particular PC. Printer Plus can be configured so that, on the printed sheet, it shows a message (or two) that you have previously written.
Also, Printer Plus hardly consumes system resources and is totally free.