* ZX Spectrum Next[1]
* Commander x16[2]
* Mega 65[3]
* C256 Foenix[4]
* Vampire V4+ Standalone[5]
* MiSTer[6]
* Maximite series
- The Monochrome Maximite[7]
- The Original Colour Maximite[8]
- Colour Maximite 2[9]
Do you know any other?[1] https://en.wikipedia.org/wiki/ZX_Spectrum_Next
[2] https://www.commanderx16.com/forum/index.php?/home/
[3] https://mega65.org/
[4] https://c256foenix.com/?v=6cc98ba2045f
[5] http://www.apollo-computer.com/v4.html
[6] https://github.com/MiSTer-devel/Main_MiSTer/wiki
[7] https://geoffg.net/MonoMaximite.html
[8] https://geoffg.net/OriginalColourMaximite.html
[9] https://geoffg.net/maximite.html
Another one that you might like for you list - I'm building one of these right now: https://smartykit.io It's a working Apple-1 clone. I consider it "modern" because it has 3 Arduino chips on board to handle input and output.
Also, check out the MiniSAM. Not only are they really useful, they're cute.
https://8bitnews.io/archive/2021-06-17/happy-birthday-8bitne...
The CERBURUS is a mix between an C64 and a ZX80/81 and the MiniPET is a pure re-creation of the original PET.
https://sites.google.com/site/libby8dev/fignition
It's a few years old now but a similar style of project.