There exist a number of Emulators for the Oric.
These are still actively maintained by their respective communities.
Oricutron for Windows, the Amiga, BeOS/Haiku, the Mac, MorphOS/AROS, Linux and the Pandora.
Clock Signal for the Mac.
MAME for a wide array of platforms (used to be Mess, which was incorporated into MAME).
These are the old timers. They work, provided you run them on the proper platform, but they are not actively maintained anymore.
Amoric for the Amiga.
Arcoric for the Acorn Archimedes.
Atoric for the Atari ST and descendants.
Emul8D for Windows.
Euphoric for Windows, Linux SVGALib and X, the Mac and Casio Cassiopeias;