Wiki system with spaces mechanism (ala confluence)?

Question

CMS

Hello. Please tell me analog of confluence. With the possibility of spaces. XWIKI supports confluence XML markup, but did not find any spaces in it. Is there anything else? Need self-hosted, preferably free, but this is discussed.

Answer 1

Alternatively, perhaps not the most optimal - Open Project
This is mainly project management, but each project has its own wiki. Possibilities are poorer than in confluence, but free. You can turn off the project modules so that they do not interfere, leave only the wiki.

Answer 2

XWiki is a second-generation wiki written in Java, licensed under the LGPL, functionality includes a blog, API tools, comments, LDAP authentication, page export to PDF. There is also the ability to program scripts (Velocity, Groovy, Python, Ruby and PHP) and support the syntax of popular wiki engines (Confluence, JSPWiki, Creole, MediaWiki, and TWiki). Used by many companies around the world. 25 interface languages, including Russian.
www.xwiki.org