I got several requests to open source the QuizX Plugin which is currently 99 USD per client: https://www.q2apro.com/plugins/quizx/
I release it as open-source on github - free for all - as soon as donations of 198 USD are collected from the community: https://www.paypal.me/q2apro
Please donate your amount and comment below about it.
Nearly no donations. I have released it without any motivation, there will be no maintainance from my side: https://github.com/q2apro/q2apro-quizx