There is no need for you to use a microphone or even say a word. Just start typing and GiggleType converts your message to text-to-speech audio. Your message can be automatically sent through Skype, Google Talk, online games and more.
For added laughs, you can convert messages using various GiggleType filters:
Cow - convert your message to cow-speak. Cussomatic - add sass to your message and let your computer swear like a sailor. Decussomatic - talk nice! Tame any curse-ridden message. Gibberish - various different filters can change your message into random and amusing blather.