TypeInBraille allows you to write in Braille on your iPhone. You can enter a character through its Braille representation using a sequence of three simple gestures. Each gesture is used to enter one of the three rows of a braille character.
Listen to the description on how to use TypeInBraille (thanks to David Woodbridge @dwoodbridge)
Write your notes
type your notes using your fingers to enter Braille dots;
edit the text (delete, select, copy, cut and paste);
navigate the text (character by character, word by word).
Send and copy your notes
send your notes via e-mail;
send your notes via text message.
copy your notes on the clipboard and paste in any application (e.g., notes).
Type in a noisy environment!
The TypeInBraille text-entry method does not totally depend on the speech feedback. You can write your notes in a noisy environment (a tramcar, at the railway station, etc.).
With TypeInBraille you can easily enter text on-the-go. You are not forced to search for keys on a virtual keyboard.
Here is a video comparison between TypeInBraille and the standard iPhone keyboard: