CozyCloud is an open source cloud application set that is personal, i.e., it's meant for one person to use for productivity and information organization. You set it up and it's yours, no one can take it (or your data) away from you. Comes out of the box with a webmail client which unifies all of your e-mail accounts, a notes and document editor and manager, a to-do tracker, a bookmark manager, a financial account manager, and an RSS feed reader. Includes a framework for developing new apps, which are appearing all the time. Built on top of node.js.

Github: https://github.com/mycozycloud/