YouTube is a video-sharing website on which users can upload, share, and view videos. YouTube displays a wide variety of user-generated video content, including movie clips, TV clips, and music videos, as well as amateur content such as video blogging and short original videos. Most of the content on YouTube has been uploaded by individuals, although media corporations offer some of their material via the site as part of the YouTube partnership program. Unregistered users may watch videos, and registered users may upload an unlimited number of videos.
Vimeo is a video-sharing website on which users can upload, share, and view videos. Vimeo does not allow commercial videos, gaming videos, pornography, or anything not created by the user to be hosted on the site.
SlideShare is an online community for sharing presentations. Community members can comment, signal favorites, and download content. Slideshare presentations can be embedded in other sites. They can be shared publicly or privately. Audio can be synched to slides.
Flickr is an image hosting and video hosting website. The service is widely used by bloggers to host images that they embed in blogs and social media. Free account users are allowed to upload 300 MB of images a month and 2 videos. Flickr also enables users to organize their photos into “sets”, which can be displayed as a slideshow and shared by embedding them in websites. Images can be public or private. Many members allow their photos to be viewed by anyone, forming a large collaborative database of categorized photos. By default, other members can leave comments about any image they have permission to view, and in many cases can add to the list of tags associated with an image.
Scribd is a document-sharing website which allows users to post documents of various formats and embed them into a web page using its iPaper format. All major document types can be formatted into iPaper including Word docs, PowerPoint presentations, PDFs, OpenDocument documents, OpenOffice.org XML documents, and PostScript files. All iPaper documents are hosted on Scribd. Scribd allows published documents to either be private or open to the larger Scribd community. The iPaper document viewer is also embeddable in any website or blog, making it simple to embed documents in their original layout regardless of file format.