NES Final Fantasy (U) - 144 KB
NES Final Fantasy II (English Prepatched) - 174 KB
NES Final Fantasy II (Japanese) - 161 KB
NES Final Fantasy III (English Prepatched) - 331 KB
NES Final Fantasy III (Japanese) - 316 KB
Final Fantasy Origins is far too large for me to distribute here, so here are directions on how I think are the best methods to download it from other places.
Option #1: Torrents
I think this is the best option. You can download practically anything from a torrent website. The torrent program that most people seem to prefer is uTorrent. Once you download the torrent program, you can then partake in downloading torrent files. There are tons of websites out there that host thousands of torrent files. I have a few popular ones listed here. Simply put "psx final fantasy origins" or "ps1 final fantasy origins" into the search and that should take you to its download. Or to save you some trouble, here's one direct link to a Final Fantasy Origins torrent:
• Bundle containing FF 7-9, Anthology, Origins, Chronicles, Tactics (all NTSC) - 5.54 GB
*The above is in .7z format - use 7-Zip (it's free) to extract it
I have more torrent websites listed in my links. Although the download above is the best torrent I can find for Final Fantasy Origins; one with just the game by itself wasn't available. This is a large file, and downloading large files from torrents could take several days. You'll need to leave your computer on overnight. But hey, it's free!
Option #2: ROM Websites
ROM websites, though not many, do distribute PSX games. Probably the best one around is EmuParaside (it's packed with ads and pop-ups). I have some more ROM sites my links.
Here are the English patches if you prefer to patch the game(s) yourself with the Japanese versions. If you need help with patching then click here.
• NES Final Fantasy 2 English Patch - 312 KB
• NES Final Fantasy 3 English Patch - 41.7 KB
You can play all of these on your computer through video game emulation. To play the NES games you need a NES emulator, a Gameboy Advance emulator for the Gameboy Advance games, and a PSX emulator for the PSX games (get the idea?). Click here for my collection of emulators! If you need help with any of the emulators, check out my emulation help site for tutorials: Video Game Emulation for Newbies.