[anthk]

If you don't have a Palm:

https://github.com/migueletto/PumpkinOS

[lxgr]

https://cloudpilot-emu.github.io/ is a great option too (works in the browser, but even better as a PWA on iOS/Android).

[dmitrygr]

I dis-recommend this HLE, as I do all HLEs -- lack of bug-for-bug compat will eventually rear its ugly head. Use cloudpilot - a real emulator of the real hardware running real unmodified ROMs right in your browser.