A backward writing website which seems fun
unɟ sɯǝǝs ɥɔıɥʍ ǝʇısqǝʍ ƃuıʇıɹʍ pɹɐʍʞɔɐq ɐ

http://www.revfad.com/flip.html


Some may just see black squares I think it relies on certain fonts being installed on the system.