BOCA Online Contest Alternatives
BOCA Online Contest is described as 'Although each local site runs its competition independently (for example, the programming environment and the submission systems are controlled locally), the problem set and test cases are prepared by a unique committee' and is an app. There are four alternatives to BOCA Online Contest for Self-Hosted solutions, Docker, Linux and Ruby. The best alternative is CTFd. It's not free, so if you're looking for a free alternative, you could try Mellivora or Hack the Arch.
CTFd is a CTF in a can. Easily modifiable and has everything you need to run a jeopardy style CTF.
No screenshots yetMellivora is a CTF engine written in PHP.
No screenshots yetThis is a scoring server built using Ruby on Rails by the Military Cyber Professionals Association (MCPA). It is free to use and extend under the MIT license (see LICENSE file).
Scoreboard used to run MITRE capture the flag competitions.