Docs Wiki could be help for students who are working on a group project together and need to write and collaborate at the same time. In addition to collaborating upon documents or notes, files and photos may be uploaded to this site to host the files so they can be retrieved later by other users or transcluded onto other websites.
This website is similar in nature to Google Docs but in addition, this site allows users to participate without registering for an account on this site although many other features will become available upon registering such as the ability to upload files, and optional email alerts for pages which the user has collaborated in.
Like a sandbox wiki, this wiki can be used for any personal need by anyone. Use it to your advantage!