[CamelCaseName]

It looks like Shazam [0] and WhatTheFont [1] [2] were both released around 1999. That said, Shazam's 1 billion + downloads indicate to me a success far greater than WhatThefont's.

[0] https://en.wikipedia.org/wiki/Shazam_(service)

[1] https://web.archive.org/web/20000818111401/https://www.myfon...

[2] http://www.myfonts.com/WhatTheFont/ (the copyright date)