A friend recommends Localwiki's new rich text editor: "it's very good,
intuitive, and elegant."
https://github.com/localwiki/sapling
http://localwiki.org/
My friend calls it "definitely worth a look" as rich text editing examples
go. The creator is Philip Neustrom, and he might be a useful resource to
provide a code tour or to share how they thought about developing its
features.
Sumana Harihareswara
Volunteer Development Coordinator
Wikimedia Foundation