Welcome to the CommunityWiki!
We talk about communities both online and offline: management, teaching, conflicts, mediation, and some tech talk mostly about tools used for online communities.
Feel free to join in. See WelcomeVisitors to get started as a contributor.
In spring 2017, yet another Twitter alternative was making the rounds, Mastodon.
If you want to jump ahead, take a look at the Mastodon User's Guide. If you want to compare Twitter and Mastodon, check out this essay by Kevin Marks, Mastodon, Twitter and publics 2017-04-24.
On this site we have started discussing FreeSoftwareNextGen.
See also:
There are many ways to structure content globally. All of GlobalContentStructuringMethods can be relevant in wikis.
There are only few ways to structure content locally, in a WikiPage.