A "chat" application to send messages between Wii U <-> 3DS over InfraRed.
I made this within a few hours only to test IR connections on the Wii U, after I spent some time reverse engineering it.
The message transmission by this app is by no means a good practice (messages might not get transmitted for unstable connections, the app might get stuck in false states, ...).
If you do want to test it, you will need to build this with a libctru build including PR #513 and a wut build including PR #288.