Dictater Adds Useful Controls to OS X Speech Services
Mac: OS X Speech Services does a great job of reading text out loud on the screen, but lacks control. Dictater is free software that adds all sorts of useful features.
Dictater adds a simple control panel to speech services where you can easily pause audio playback, skip sentences or paragraphs forward, play sentences, and adds a teleprompter mode for reading along with artificially spoken audio. Obviously, not all of us need or use speech services, but it is very useful for those who need them, and Dictater is a much more powerful tool than the one built into OS X.
Dictator (free) | via Brett Terpestra