Moneydance is excellent personal
financial management software for Linux. It also runs on Mac OS X and Windows,
which means it's easy to try out even before a complete switch to Linux
happens.

While Moneydance is free to try, there is a $25 cost to add more than 100
transactions.

Mark and Hopi like it because it has many of the features and ease-of-use of
Quicken, and supports importing the standards QIF format. This makes switching
from Quicken or Money rather easy.

Moneydance is easy to install following the instructions on their website. You
may need to add your own menu entry when you are done. (Try right-clicking on
the Start menu to launch the menu editor.)

GnuCash

For those who prefer a free, open source solution, there are good alternatives
as well. GnuCash is perhaps the most
popular and comes with Mandriva Linux. It is capable of small business
accounting as well as personal finance management. Locally, Ehren Nagel uses
it to manage the finances of his own small businesses.

It uses a double entry accounting system which take some adjusting for Quicken users.
Like Moneydance, it imports the QIF format for an easy transistion.