Probably the most comprehensive league management software available
Redseal Software produces the Universal League Manager, league sofware for running leagues and knockout tournaments.
The Universal League Manager can also produce a complete league website if required. Why not download the trial software and try it for free.
See what other people think about the software by looking at the testimonials page.
The latest software is version 3.84 released 15th April 2013.
The next full release is expected around the summer of 2013.