It looks as though the original host of the excellent pSX PlayStation One emulator - psxemulator.gazaxian.com - has gone down. The site hadn’t been maintained in a while and I fear it may have been forever abandoned. As such, I’ve added the most recent version of the emulator to this site. You can find it here.
Besides being easier to configure than ePSXe, pSX comes with a rather handy MIPS R3000a debugger that’s very handy in reversing work. I used it extensively in writing my Long range enemy attack mod for Final Fantasy VII.