From Custom Solutions of Maryland:
Speed Reading III lets the user try one method to increase reading speed and comprehension. Ten practice text sources are built-in and you can also select any text file as a source. Reading speed can be adjusted from approximately 50 words per minute to 1500 words per minute using four radio buttons (very slow, slow, medium and high) and a slider. Comprehension is not tested. This utility displays full text very dimly with snapshots of normal black text moving across the page.
What's new in this version:
Version 1.6.0 is compatible with El Capitan.