Neptune – Get Stuff Done
http://www.neptunehq.com/

Neptune is a web-based tool to help you get stuff done. It is based on the principles in David Allen’s Getting Things Done. Neptune is simple, fast, and stays out of your way with these features: a) Easy to “collect” information on the site, or email new tasks to Neptune at any time to keep them out of your head, b) Receive an email report every morning with your next actions and reminders, c) Online document system to allow you to create reference materials, or upload any file and store it with a project. Works on any modern browser, so wherever you are in the world, you will always have access to your projects. This has been added to the tools section of Research Resources Subject Tracer™ Information Blog.