Between 2009 and 2017 I was the results official and software developer for Wiltshire Schools' Athletic Association. I developed a Windows Desktop and Mobile app to facilitate the rapid entry of results, certification, and team selection.
I am no longer involved with WSAA and as such I no longer maintain the Championship.Solutions software and have closed the website, however you can still download the installer for the application and see it's source code on GitHub.
The final version of the desktop application was written in C# using WPF. It used a SQLite database for its file storage and has an internal web server to allow multiple users to access the system simultaneously across a local network.