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What is Ultibo?
Imagine if you could have the simplicity and freedom of Arduino with the power and features of a Raspberry Pi. With the ease of a microcontroller and the flexibility of a real computer, Ultibo gives you a platform for creating anything without the limitations of a traditional operating system.
The development language for this is Pascal (specifically the Object Pascal variant using the FreePascal compiler), which might put some people off, but it's is actually a very powerful and easy to learn language which has been around as long as C.
The 'Make' page https://ultibo.org/make/ has some cool stuff that's been done with and for Ultibo, some good tutorial videos, and links to other 'bare metal' environments based on C++, Assembler, and C (if that's more to your liking) but from what I can see, Ultibo is the most advanced of them so far.
Check it out!
from rummaging around the Lazarus/FreePascal forums