"Linux users have a multitude of choices for personal finance
applications, including GnuCash, KMyMoney, Kapital, and others, not
to mention being able to run Quicken under WINE. One good
alternative that runs on multiple operating systems and manages
finances with ease is Moneydance.
"Moneydance isn't free, but it does run on Windows, Mac OS X,
Linux, Unix, and Solaris, due to it being coded in Java..."