This is great budgeting software that I use. It's pretty popular and easy to use, but it's not the cheapest. They don't do discounts very often so thought this might help someone out if they were thinking of buying it.
Ends Monday US time.
YNAB has won a few awards and has good reviews:
http://lifehacker.com/5829256/most-popular-personal-finance-…
http://financialsoft.about.com/od/reviewsfinancesoftware/ss/…
http://www.macworld.com/article/155467/2010/11/youneedabudge…
http://www.amazon.com/You-Need-Budget-YNAB-Personal/product-…
The mobile (iPhone/Android) app is also great for tracking transactions on the go - you then sync the transactions to your PC/Mac.
Sync to the cloud is a feature that will be released soon.
There's nothing worth paying for here.
Plenty of other completely free alternatives are more usable and with more features, eg Buddy, JavaBudget, or my personal fave http://sites.google.com/site/dsbudgethome/