Scalar is a free content management platform for creating "digital publications" or digital books. This is a great platform if you have a lot of information to share and want to have your users explore the information in a particular way. This platform is not intended to create typical websites, but is intended for scholarly audiences as a way to create beautiful, creative publications of research for an academic audience.
Scalar supports the following multimedia file types:
Maps: KML
Audio: MPEG-3, Ogg, WAV
Image: GIF, JPEG, PNG, DZI
Text: HTML, JavaScript, Java, TXT, XML, PDF
Video: FLV, M4V, MPEG-4, Ogg, WebM, QuickTime
Scalar has the ability to annotate textual and multimedia resource directly within the Scalar interface. Through this tool, you can seamlessly mark-up any resource that you have with additional comments, images, and anything else that you may want to draw attention to.
Image Credit: http://scalar.usc.edu/features/annotations/
Scalar has a variety of built in visualization tools that allow the author and the reader to see the connections created within the publication itself. By creating "paths" between content, tags, and annotations of that content, the visualization tools allow this information to be displayed in an interesting way providing for a new and different experience with the research materials.
Image Credit: http://scalar.usc.edu/features/built-in-visualizations/
Scalar is a great and easy to way to collaborate on publications. Books are easily shared among editors and keeps track of when changes were made and who edited them. This feature is free unlike many other websites and digital tools with collaborating capabilities.