Annotation software or add-ons are valuable tools for academic websites and teaching applications, allowing collaborative discussion and editing of course texts. Here’s a quick round-up of some of the more notable options:

1. WordPress plugins
   •  Digress.it (http://digress.it/) Examples: http://camdenannotation.lookingforwhitman.org/  and  http://candide.nypl.org/text/chapter-1
   •  CommentPress –  compatible with WordPress 3.5.1  (http://wordpress.org/extend/plugins/commentpress-core/)
   •  Highlighter (http://highlighter.com/)
2. Google docs or similiar cloud interactive services (I think we can rule this out simply on ownership/copyright issues)
3. Code plugins
   •  JQuery Annotator  (http://okfnlabs.org/annotator/) – Simple to install. [On github] (https://github.com/okfn/annotator)
4. PDF page-flipper type add-ons that have annotation capability (these are generally expensive and not necessarily up to the job.)
5. Browser add-ons (e.g. Zotero for Firefox, or Wired Marker) – not practical for ‘public’ use.
6. Other services
   •  A.nnotate   (http://a.nnotate.com/)  –  An Edinburgh-based annotation service, with free and paid options.