SlideShare, Picasa, Google Drive, JustCloud, YouTube, and Scribd are cloud storage and file sharing services. SlideShare allows users to store and share presentations, while Picasa allows photo organization and editing. Google Drive provides cloud storage and file synchronization across devices. JustCloud offers unlimited cloud storage for less than $10 per month. YouTube and Scribd allow users to share videos and documents, respectively, and both see millions of users each month accessing shared content.