Any way of getting a better webmail service than either Horde or Squirrelmail?

[ncjbhd]

Are there any third-party solutions/scripts that provide a superior webmail service than the standard ones provided with shared cpanel hosts?

Been using Horde and Squirrelmail for years, but neither is as user-friendly or feature-rich as I'd like them to be.

We'd like to continue using our existing host, but utilise a more advanced webmail service.

Thank you.