I've been doing online tests for about 7 years now. I have most of my stuff on socrative.com. I can give multiple choice, true/false, multiple select, and short answer. I have them turn their desks around during the test so I can see everyone's screen. I run GoGuardian as well so they are locked to the test site. Source: about 2 years ago

TripleA is the most popular client I'm familiar with. Quite active. They have a bunch of variants but you can play the standard default stuff too. Source: about 1 year ago

It's 2-3 hours with computerized rules enforcement : https://triplea-game.org/. Source: about 1 year ago

There is also TripleA, which is open source and has a large variety of maps and rule variants. https://triplea-game.org/. Source: over 1 year ago

Side note: I really liked Axis and Allies, played it several times as a young adult with a few close friends. There is a nice open-source implementation of it, if you want to "play" instead of work. [0] However, it misses the social part. [0]: https://triplea-game.org/. - Source: Hacker News / over 1 year ago

My advice would be to try all the official versions on TripleA (https://triplea-game.org/) to get a feel for the version you like before you spend any money on a new game. Source: over 1 year ago