Do you wish YouTube's embedded video player was just a bit better? If so, try out EmbedPlus. EmbedPlus adds scene-skipping, annotations, zoom and more playback controls than the embedded YouTube player.
really cool online comic creator, the interface is fun to use and very intuitive. It is obviously geared toward students with a great look and even an embedded music player. I love the details on this site, including the headline "Reading isn't only in books, it's everywhere!". Using the Graphic Novel Creator, students can create their own multi-page graphic novels with interesting backgrounds, characters, props, and customized text. The graphic novels can be saved and printed out.
Instacalc is a nice shareable calculator that can be embedded into a site. Also, a user can create colored charts and look up formulas which is an excellent feature of most spreadsheets.