Although Wikipedia is a great place to find information, it's subject to incomplete citations, biased views, and inaccuracies. And when you absolutely have to have undisputable facts, that's just not good enough. Fortunately, there are plenty of alternatives out there that can deliver with high quality accuracy, and we've listed 25 of the best here.
WikiBrowser is a browser of the graph of Wikipedia's interlanguage links. It analyses the inconsistent components of the graph and visualizes the results in an informative way.
I have started to use moodle and I am very pleased by its forum module. Because - there is a nice threading - your receive a notification, if somebody answers a post of you.
R. Biswas, R. Sofronova, H. Sack, and M. Alam. K-CAP '21: Knowledge Capture Conference, Virtual Event, USA, December 2-3, 2021, page 81--88. ACM, (2021)