FastSpell is a useful spell checking utility that seamlessly integrates with nearly every application on your desktop. FastSpell monitors the keyboard as you type and checks for spelling errors on the fly!It is also a shorthand toy

Features List
Beep on misspelled words (including .wav file support)
Spell checking all text
Spell checking the Highlight text
Custom “User” dictionaries
Disable on a per application basis.

artiw FastSpell keywords: spell check, shorthand