Diigo is a research tool that allows users to bookmark web pages, highlight text, and add sticky notes. Bookmarks and annotations are accessible from any device. Users can organize bookmarks with tags or lists and share them through blogs, websites, or email. Groups allow for collaborative research, with features like group bookmarks, discussions in sticky notes, and enforced tagging consistency. Users can also find popular or related bookmarks by tags, sites, or users. Profiles are based on tagging activity, and users can connect with others through common interests or an "people like me" search. Webslides turns bookmarks into interactive slideshows for sharing resources or giving guided tours of websites.