WebAssembly Micro Runtime (WAMR)
C package manager-ish
Public repository of the Micro QuickJS Javascript Engine
A glib-like multi-platform c library
An assembler for the legendary 6502 processor and it's derivatives
Run (or just build) single C or C++ source file
Hardware-optimized Arduino library
Set of tests for fuzzing engines
C for programmable guitar amp
Another Real Time Kernel for Arduino
Hypervisor R&D for recent x86 with support for DRTM + 2D paging
Microcontroller Task Scheduler
Micro LCD s/w driver for embedded systems
All in, COBOL
something that writes code for you