PCSX-ReARMed is another PCSX fork, based on PCSX-Reloaded. It has no relation to PSX4ALL, PSX4Pandora or PCSX4ALL (other than being PCSX derived) and has the source available (under GPL2). The main feature it has is Ari64’s dynarec, modified to suit PCSX. There is a bit of NEON for color space conversion too. The compatibility should be close to the PC version.

Other notes:

BIOS files are optional, but are needed for compatibility with some games. These uncompressed files should be copied to /pandora/appdata/pcsx_rearmed/bios/ , and selected after launching the emulator itself (Optopns -> BIOS/Plugins).