Dictation is a free online speech recognition software powered by Google Chrome. You can use Dictation to write emails and documents in the browser with your voice
"Speech Recognition in the Browser
With Dictation, you can use the magic of speech recognition to write emails, narrate essays and long documents in the browser without touching the keyboard.
To get started, just connect the microphone to your computer and click the Start Dictation button.
Jim Lerman's insight:
This app works very well. It's not quite up to the standards of Dragon Naturally Speaking, but then again, it is free.
Via Jim Lerman, Lavinia Ionica, Shona Whyte