If you have RPG maker for PS1, here is a site where you can download games that people have made using it:

http://www.rpgmpavilion.com/index.php?page=rpgm1games

They also games from RPG Maker 2 & 3 for PS2 and the PC version of RPG maker there.

All you need is a DEX Drive and a PS1, or the easier way to do it is own a PS3 and just put the game files on a flash drive to be copied to a virtual PS1 memory card.

Basically a ton of free RPGs.