script writing software for Linux

At present I am giving consideration to changing my operating system from Windows 7 to Linux, on my Netbook ASUS EeePC.
I chiefly use the device for script writing & email. I am using Final Draft for my work. Is there any compatible formatting software available if I were to switch ? I have only used Ubuntu/Linux so far on a trial basis and am very impressed with speed and efficiency of operation - I would appreciate any help or assistance in this matter, thank you.

How about Trelby

an opinion:

To install in Ubuntu … download this file:
http://www.trelby.org/files/release/2.2/trelby_2.2_all.deb
and double-click to install.

Also see:
http://alternativeto.net/software/final-draft/?platform=linux