You can enable wiki features for rich text fields in zope 3. What other features does this add besides ((double paren)) wiki linking?
Basically, linking is it! Instead, it integrates tightly with the CMS, so it can be used in rich text fields of any content together with all the other CMS features. To quote the README from a version of wicked (which is the origin of this Plone 3 feature): Wiki does two things really well: convenient document creation, immediate interlinking of documents. To leverage these features, wiki’s have a nasty tendency to aggregate random other features. Wicked will attempt to reduce ‘wiki’ to a feature of content rather by stripping away everything except for providing a framework for creating, tracking, and managing wiki links within a CMF site. wicked will yield all other feature unto the CMS (I would like to see implementation of a ZWiki feature near and dear to my heart, page hierarchies, aka “parenting”.