Classroom Salon is a document and video annotation system. All your course documents and videos can be annotated by students using salon's annotation tools. They can comment on specific words, sentences and paragraphs and also comment on video frames. Salon aggregates all these annotations to provide amazing insights into student thinking.
Upload a PDF and add video, images, audio, comments, and quizzes. (You can also annotate using a pen, but only you will see those annotations.) You can also create classes and add the PDFs and students to them.
Limitations: With the free account, you cannot make a document private.
Annotate texts online using colored highlighters, text comments, and tags. Collaborate with other users and groups. Requires creating a free account to share the texts.
Enter a text with special coding for annotations. The resulting text has clickable links that show the gloss in an area to the side of the text. You need to save the HTML page/code and put it into a webpage or LMS.
Use books and articles in English or import your own in any language. You can add annotations and questions to the articles, plus create quizzes. Students can also comment on the articles.
Limitations: Free accounts can only import 3 articles per month. Presumably, you can use as many of the existing articles and books as you want, but they are only in English.
Upload an ePUB file (including images, audio, and video). You and others of your choosing can add text comments at specific points.
See also: http://chronicle.com/blogs/profhacker/using-video-annotation-tools-to-teach-film-analysis/57171?cid=wc&utm_source=wc&utm_medium=en
A browser add-on that lets you add clipart and links to YouTube videos.
Limitations: Previously, this allowed you to annotate and add subtitles to YouTube videos, but now it is only clipart and links. It is now is a Facebook app instead of a stand-alone application.
This free tool allows you to create hypermedia glosses including text, pictures, videos, audio. It is available in many languages. A.k.a. FLAn: foreign language annotator.
Created by Dr. Thom Thibault, who is very active in CALICO
Satori Reader provides carefully curated, level-appropriate content with which to practice and grow.
With thoughtfully annotated articles spanning a variety of interesting subject matter and a unique system that presents content in a manner appropriate to your knowledge, it bridges the gap between the controlled, textbook Japanese that most students start with and the wide-open world of real-life, native communication.