Xpresso Motion Tools
This is a series of Xpresso tools for Cinema 4D. The last slide in the header is a video showing what you get. :)
Underwood
Classic typewriter effect which has rate / spline control so that you can 'backspace' characters and set keyframes to re-write the text on display. It also have frame start option and an output field so you know what frame the animation will complete on.