1. Buxfer

Description: Easy to use and with a clean UI, Buxfer allows you to easily track your income and expenses, and set up budgets. Unlike other similar sites, you don’t have to provide your online banking credentials if you don’t want to. It also has support for Google Gears to work offline and store your financial information locally.
Why: Stress free personal finance management.
Honorable mention: mint.com
URL: buxfer.com

2. Remember the milk

Description: A feature-rich task management application full of bells and whistles, including support for tagging, priority, scheduling, sharing, and so on. It works very well for those following the principles behind Getting Things Done (GTD). Despite its many features, the UI is clean, fast and well thought-out, so it’s fairly easy to make it work for you. Several keyboard shortcuts are available, minimizing the amount of time you need to spend entering data. It integrates with Gmail and Google Calendar as well.
Why: Smart TODO management.
Honorable mention: tadalist.com
URL: rememberthemilk.com

3. RescueTime

Description: Upon installing a client on your computer (Mac or Windows), your application and website usage will be securely tracked. Reports are available online and by email. Privacy cautious users can define what gets tracked and what doesn’t, through a whitelist mechanism. By using tags is possible to group applications and sites in order to track the amount of time spent, for example, on a given project.
Why: Keep track of where your time goes.
Honorable mention: 8aweek.com
URL: rescuetime.com

4. Joe’s Goals

Description: They say that goals are dreams with a deadline. Achieving goals requires clarity of what you want to accomplish and tracking your progresses. Joe’s Goals has an extremely simple interface to track whether you worked towards a given goal or not, on a daily basis. It couldn’t get any easier than this, but it can be very effective in reminding you of your “resolutions”.
Why: Stay focused on your goals one day at a time.
Honorable mention: daily-actions.com
URL: joesgoals.com

5. SparkPeople

Description: A great social network of people who are interested in dieting and living a healthy lifestyle. The site offers diet plans, diet and exercise tracking, great articles, daily newsletters and blogs. It’s by far the best of its kind.
Why: Encouragement and tips for healthy living.
Honorable mention: traineo.com
URL: sparkpeople.com

So what do you think about them? What are some other sites that you find truly invaluable to aid you in organizing your life?