Backpack is a tool that helps you stay organized. It's main features include user-generated pages for calendar and reminders, to-do lists, notes and images.
A great feature is that you can email additions to your Backpack pages. For instance, you can add "visit TechCrunch" to your to-do list via email.
Pricing starts at free for limited Backpack pages and increases in tiers depending on how many pages you want.