- an emulator of multiple systems, including the Acorn Electron;
- that tries to be a little more rigorous than the average in audio and video output — raw audio is sampled at the machine's native rate then lowpass filtered and resampled to whatever your machine supports, composite video output is offered via a genuine composite encoding and decoding, etc;
- which attempts to optimise for user friendliness and emulator invisibility, automatically selecting a hardware configuration, entering appropriate loading commands, etc, when the user selects a piece of media.
Potentially also of interest compared to other emulators: windows are freely resizeable and you may use arbitrarily many emulated machines at once. If it needs additional ROM images then it'll ask you to provide them via the GUI.
Interesting file formats supported are, at least: UEF, SSD/DSD, HFE (with HFEv3 support coming soon). Once you've started an Electron it'll actually allow you to insert any disk format the emulator otherwise supports so you can also prove to yourself that a WD1770 really, really can't read Apple GCR if you wish; potentially more useful is inserting things like DMKs, Amstrad CPC-style DSKs, etc, for data exchange.
I'm looking into providing this as a Snap so that it appears directly in the app stores of some Linux distributions but haven't quite hit upon the magic formula yet. If anybody has any experience in that, I'd certainly welcome it.
If you're a Mac user, you'll probably prefer to grab a binary release.