The first four Final Fantasies get a Remake and port.
Final Fantasy V gets a PC port and a GBA port.
Final Fantasy VI gets a PC port and a GBA port.
Final Fantasy VII gets more clearer graphics on it's PC port.
Final Fantasy VIII gets more clearer graphics on it's PC port.
Final Fantasy IX gets more clearer graphics on it's PC and mobile port.
Final Fantasy X and it's sequel gets a full HD Remaster with international content and remastered music.
Final Fantasy XI is an MMO, and I do not recall any remasters or ports.
Final Fantasy XII is getting an upcoming full HD Remaster with remastered graphics, international content, and I believe music.
Final Fantasy XIII and it's sequels are rumored to get a PS4 remaster.
I believe XI got a port on PC through Steam. ~~~~