Blog: A blog can be a personal website,web page and inside the blog are individual opinions and links to other sites.
Social Bookmarking: It is a way for people to store, organize, search and manage "bookmarks" of a web page.
Wiki: It is a website or database developed collaboratively by a community of users, allowing any user to add and edit content.
Web Authoring: The creation and maintenance of a website.
Software: The programs and other operating information used by a computer.