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.
Video lessons on a wide range of subjects, aligned to Common Core. Seem to currently (as of 5/12/2013) have no language lessons. However, you can use this as a repository to upload your own lessons and share them.
This website allows even novice learners of Japanese to explore special interests in Japanese language and culture, through videos, articles, and other supports around chosen topics.
Website from the Japan Foundation that provides karaoke-style music videos with lyrics in kana and romaji. Sort by children's/traditional songs or "indie" music, difficulty of language, and theme.
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.