K X A really powerful, elegant complete speed reading course. The best program I've found for speed reading training, along with AceReader Pro Deluxe, which has been featured here before.
I have them both, and like them both. Each has its strengths, and the interfaces are very different , so someone may prefer one over the other.
The Reader's Edge has has a huge amount of texts you can use to practice with and has a built-in coaching feature.
The Reader's Edge desktop version is for the PC, but they also have an online version which can be used by Mac owners.
I've recommended this program to people before, but if there's a one-day discount deal for it on Bits, I think they'd be more inclined to buy it.
The program is designed for multiple users. The Pro version can be installed on 2 computers, and each installation allows unlimited multiple users. Also, free lifetime updates.
They have an online demo, but it doesn't do the program justice, since you only get to try out a handful of the features.