Conclusion

17 wiki engines (listed on WikiMatrix) use asterisks for bold and unordered lists, how do they resolve the "ambiguity problem"? Please discuss on this discussion page. Also see Require Space After Bullet Proposal.

** for bold, multiple asterisks for multi-level lists

(a second-level list item as ** and a third-level list item as ***)

• Confluence
• ErfurtWiki
• MidgardWiki
• Oddmuse (also accepts *bold* )
• PBWiki
• WikiSpaces

** for bold, indentation for multi-level lists

(a second-level list item has spaces in front of it, a third-level has more spaces)

• DokuWiki
• FlexWiki
• GeboGebo
• OpenWikiNG
• QwikWiki

* for bold, multiple asterisks for multi-lists

• Instiki
• KWikiKWiki
• Netcipia
• PhpWiki
• SocialText

* for bold, indentation for multi-level lists

• TWiki