Rotate 123 is a great volleyball rotation coaching tool that allows you to input numerous line-ups in a variety of offenses (5 - 1, 6 - 2). Instead of writing down all 6 rotations by hand, crossing-out, and manipulating serve receive patterns, just enter your roster into the system and drag-and-drop into their positions. Voila! You can manipulate your line-up a million times from there with all the players in your roster. It even includes libero entry (for any position) and defensive specialist entry.
The software was created and designed by two volleyball enthusiasts that coach club and high school volleyball. So it has real/game-like functionality. It's been featured and promoted by the AVCA (a nice plug) and its FREE! Yes, so far it's free! Jump on it now and check it out.