The History Commons
As someone who has been writing about the commons for many years, I am still amazed when new ones pop up. Here's another:The History Commons website is an experiment in open-content civic journalism. It provides a space for people to conduct grassroots-level investigations on any issue, providing the public with a useful tool to conduct oversight of government and private sector entities. It is collaborative and thus allows individuals to build upon the work of others. Each investigation is organized as a “project,” which is made up of at least one timeline. You can contribute to a project by adding new events to the timeline associated with that project. All submissions are peer-reviewed by other users before being published. If you would like to participate in this effort, you will first need to create a user account. Once you have done that, you can begin adding events to any timeline.
(Via CommonsBlog.)