PCSX-Reloaded

Current version:	1.9.92
Active:	Yes
OS:	PSX
Authors:	PCSX-R Team
Official website:	https://pcsxr.codeplex.com/
Source code:	Unknown

PCSX-Reloaded is an enhancement-focused, plugin-based PSX emulator.

Download

Latest SVN build for Windows

Review

It's the best choice if you want to play 3D games at resolutions bigger than native. If you encounter glitches or it's a 2D game, use Mednafen instead.
The stable release is very old, so use the latest SVN build instead.
Check Recommended PSX Plugins for plugin configuration.

Changing discs with PCSX-R

Some games (like Final Fantasy) allow you to save in the "Disc Change screen". For games that don't allow that (like Metal Gear Solid), disc switching can be a bit tricky:

1. Press F9 to open Disc tray
2. Press Esc to go to PCSX-R menu
3. Emulator → Switch ISO...
4. Emulator → Run
5. Press F10 to close Disc tray

Source Code

https://pcsxr.codeplex.com/