Mint.
It’s beta, but so far it looks pretty cool. You set up a budget, it logs in to your checking and savings accounts, credit cards, investments and the like and tracks your income and spending. Makes tracking spending so much easier and the default categories it chose were pretty accurate. Also, when you have multiple accounts with various companies, having them aggregated makes everything easier and clearer.
It could use a few more features, especially in the entry of future expenses. It’s a great reactive budget tool, but not so good on the proactive part. Also, breaking out savings vs. checking accounts would be nice, but it’s pretty dang cool for free and minimal effort.
Ah.. and I thought you meant this Mint:
http://www.linuxmint.com/
Hmm. I’m intrigued by it. Looks like they address one of my main complaints with Ubuntu. I might give them a try next time I upgrade.