Dr. Neau tournament manager seems like it is abandonware now?
Last release that is offered for download on the website is from April 2012, his forum is flooded with spam, and after like a full page of spam threads I find *two* legit threads from people which went like "hey, I sent payment for a license a week ago, nothing here yet, what's up?" and zero replies on them.
Extremely bad market situation apparently.
Mobile-only apps are not even worth a consideration for me, they are too inflexible, and the other crap is hosted in the cloud. Subscription-only is already bad enough, but combined with not having control over the installation (their servers could go down/be taken offline any day, even before your subscription period ends) AND also giving your (and your buddies') data away to third parties, those are also out of consideration. The thing from Dr Neau had the big appeal that it was Java-based, hence cross-platform, and running on your local machine(s).
Leaves only three other desktop applications I found with a quick Google search... all Windows-only, all looking fairly dated, one even so extremely ancient that the website shows screenshots that appear to be made with Windows 98.
Smells like a market niche is open here. I'm a software developer and probably already have most of the skills/knowledge on the technical side to be able to build something good, but I'm not sure if sacrificing a big chunk of my free time over a considerable amount of time to work on a solid, modern and fair solution would really pay off. Not sure if maybe most tournament hosts just don't give a shit about the drawbacks and are happy with the relatively up-to-date third-party hosted solutions.