Update: Thrive has been shut down, but you can still see my always up-to-date list of free money management tools.
Thrive has popped up as Mint's number one competition. The site offers what Mint does with a different emphasis. While Mint focuses on the budget, Thrive focuses on goals and advice. Wesabe, another Mint alternative, gives advice in the form of community support. Thrive acts as a free professional financial adviser.
I have written a new post on this, Mint.com vs. Thrive Comparison. The new post gives an in depth look at Thrive and a full comparison of both sites.