Yodlee
mobile.yodlee.com/ (HTML5)
Yodlee has Bill Pay too. You can pay bills online from any of your linked credit card accounts and Yodlee can also act as a front end to many bank's bill payment systems.
Budgeting is another Yodlee feature. You set of goals for certain classes of expenditures like entertainment and Yodlee will alert you when get near or exceed your goal. There are budget reports and graphs to help you visualize where all that money went.
Yodlee is the most powerful and feature rich free online money management system I've seen yet. It's not limited to just financial services either. Yodlee can also import and display your gMail, Hotmail or Yahoo Mail, although it just shows a read only view of the subjects of recent mails. To read the full email and reply Yodlee offers a link that automatically logs you into the webmail providers site.
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