Collaborative Internet projects are efforts in which users work together over the Internet to achieve a goal, often using wiki technology. Wiki Web sites, such as Wikipedia, allow anyone to edit and contribute to them. Other popular collaborative projects include tools like Basecamp and Podio, which provide social media interfaces for organizing project and event-planning schedules, messages, to-do lists, and workflows. Kickstarter is a tool for collaborative fundraising for creative projects, InnoCentive is a crowd-sourcing community offering payments for people who can solve business and scientific problems, and Change.org is a petition project used to push for social change.

Social networking sites are Web sites that allow users to create content, share ideas, and interact with friends. Users create a profile and can typically upload photos, share music lists, play games, and post messages to friends. MySpace was the first popular social networking site, while Facebook is the most popular choice today. Other social networking sites include LiveJournal, Hi5, Bebo, Orkut, LinkedIn, and Google+.