Knock Knock
Knock is small and in most cases useless program, which pops up small message when get something on port 22222 via network. Whole software is writen in Java 7 and is glued from pieces from here and here (thank you, guys) for one hour, so code is little bit dirty (sorry).
We want use it instead of bell with my roommate :)
Hope you enjoy that!
Download source: Knock.zip
Download jar: Knock.jar
WARNING: Actually works only on Linux…