Re-releases include:
Final Fantasy I and II as part of Final Fantasy Origins for the Playstation
Final Fantasy I and II as part of Final Fantasy Dawn of Souls for the Gameboy Advance
Final Fantasy IV and Chrono Trigger as part of Final Fantasy Chronicles for the Playstation
Final Fantasy V and VI as part of Final Fantasy Anthologies for the Playstation.
Final Fantasy III will be released for the DS

To note, the names of these packages differ for the European releases, but all the numbers are right.