Author of FreeFileSync publishes binaries for Ubuntu for each release. But you have to install them again and again, once a month. That’s why I am the maintainer of FreeFileSync PPA, the way in Ubuntu to distribute binaries with automatic updates.
As of May 2014, here are the FreeFileSync versions available for each Ubuntu series:
|Ubuntu series||Last available version of FreeFileSync||Supported ?||Comment|
|Precise||5.21||No||Requires newer libraries|
|Quantal||5.23||No||Requires newer libraries|
|Raring||5.23||No||Requires newer libraries|
|Saucy||6.0||Could be if asked|