Since WikiAnswers is a wiki (a collaborative project run by multiple people), there are many "affiliations" of it. Not necessarily all the same goals though. There is Wikipedia, the online encyclopedia, there is Wiktionary, the online dictionary and there is wikiHow, the online how-to manual. Whatever the wiki, they're all usually free to read and edit. You can find a full list of wikis by clicking on the Related Link section below this answer box.

Note that there are many wikis that are just "starting out" so the full list isn't on Wikipedia; just a lot of the well known wikis.