Backpack is a nice web based organizer, hosted at backpackit.com. With backpack, you have a set of useful utilities for personal organization, such as notes, todo lists, file sharing, reminders, and whiteboards.
To start using backpack, you need to create a user account. You can create one for free, with a limited number of pages, or for just $5 a month you can have an unlimited account. Each account allows you to create a set of pages.
The main difference of web pages created at backpack is that they are fully dynamic. You can add item on the fly, without edditing HTML. In this sense, it works more like a organizer application. You can also do many cool things, such as adding reminders for specific times (they will send you a message at that time), or even send messages and files to a given page. To make the last feature possible, each page in backpack has a unique email address. When a message is sent to that address, it is appended to your page, and you can see in your list. This is a very nice way of sending reminders and small notes to yourself.
Users are doing all kinds of nice stuff with the software. See for example how to use it for notes on school and how to use it to log your missed phone calls!
