I work for a nonprofit called ATD and I discovered this tool in an article from a monthly magazine that we put together.
Hipchat is a project app. While targeted at a corporate audience I believe it has potential to reach beyond just an office setting. Hipchat allows for group and private messaging, video chat, screen sharing and file sharing. It is build for the purpose of collaborating on projects. So sticking with the theme of this week, many people forming partnerships may find this tool useful especially in the planning stage. Hipchat can be used across devices and there is a web based version. It can be integrated with other business apps such as MailChimp. In addition–you can connect the app to instagram feeds and twitter.
Hipchat is organized into chatrooms based on the project that you are working on.
For additional information about the app or to try it for yourself, go to http://www.hipchat.com