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None will be a perfect replacement for all the features but try and get near enough.
wiki.js
https://js.wiki/ and https://github.com/requarks/wiki
Pros:
- Simple install
- WYSIWYG editor is reasonably good (inter-wiki links are a bit of a pain)
- Has breadcrumbs and page hierarchy (even if sidebar navigation is a bit pants and you have to set your own breadcrumb names by hand)
- Can alter the search engine to be better than usual
- Has a basic kind of confluence import
Cons:
- Table of Contents zone + sidebar takes up 1/3rd of your screen
- Version 2.x is pretty static and 3.x is not due for ages even though it contains some good features we'd want
- Asset manager is not awful but not great
- Importing from Confluence will involve some manual work, some things might need to be reformatted
- User management doesn't look great
- Limited customisation options (eg navigation/toc bars) and no plugins
Outline
https://www.getoutline.com/ and https://github.com/outline/outline
Pros:
- Has Confluence import https://docs.getoutline.com/s/guide/doc/confluence-import-UGCiYLYgBd but not fully complete
- Templates
- WYSIWG editor (untested) and Markdown support
- Diagrams
- Multiple "workspaces" allowing NWN1/NWN2/lexicon separation
Cons:
- No mediawiki import
- No categories, or page tags by default? Not sure how you find things other than breadcrums or search which can be tough in some instances (such as the lexicon content)
Bookstack
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