This morning, I saw my friend's plurk username turned into a rather odd name. Apparently he write his username by upside down, which known as flip text. Flip text is the result of reflection from a text, therefore, often also called as mirror text.
If you write "how to create flip text" the machine will automatically create a reflection upside down into ʇxǝʇ dılɟ ǝʇıɹʍ oʇ ʍoɥ. Do we have to use certain software to write upside down?
Lots of websites that provide free tools to make the text fold. Here is a list of 20 websites that provide facilities to create a flip text or write upside down:
9 Flip Text Generators: