Some of the add-ons I discussed in my talk on "The Open Educator as DJ" - http://edtechpost.wikispaces.com/Open+Educator+as+DJ+(Final)
The easy way to download and convert Web videos from hundreds of YouTube-like sites.
Nota del recopilador part of the "Sample" step of the DJ workflow, sometimes you need to grab the source video files, and not just link to them
Nota del recopilador you need Greasemonkey to run things like the OER Recommender script, other page augmentation techniques as well as the mediawiki presentation script
Note from Mozilla: This add-on has been discontinued. Try Evernote instead.
Clipmarks lets you clip and share specific parts of articles, or anything else you read.
Nota del recopilador A critical component of the OER DJ arsenal, this allows you to clip items out of any webpage and produce an RSS feed of the clippings