To write backwards : http://www.bored.com/writebackwards/
To write upside down: http://www.fliptext.org/
To confuse (drunk) people, combine those two

Have fun

ʇo ʍɹıʇǝ qɐɔʞʍɐɹps : ɥʇʇd://ʍʍʍ˙qoɹǝp˙ɔoɯ/ʍɹıʇǝqɐɔʞʍɐɹps/
ʇo ʍɹıʇǝ ndsıpǝ poʍu: ɥʇʇd://ʍʍʍ˙ɟןıdʇǝxʇ˙oɹb/
ʇo ɔouɟnsǝ )pɹnuʞ( dǝodןǝ' ɔoɯqıuǝ ʇɥosǝ ʇʍo

ɥɐʌǝ ɟnu

Odd

http://www.mos.org/sln/Leonardo/Leonard ... oLeft.html

We can all be beautiful mad geniuses XD