Loxy

Lox in C (from Crafting Interpreters: A Tree-walk Interpreter)

make && ./loxy

Related

Loxy (Lox in C, A Tree-walk Interpreter, from Crafting Interpreters)
Glox (Lox in Go, A Tree-walk Interpreter, from Crafting Interpreters)
Xol (Lox in C, A Bytecode Virtual Machine, from Crafting Interpreters)
Xolg (Lox in Go, A Bytecode Virtual Machine, from Crafting Interpreters)

Tyrion (implementation of Ion, from Bitwise)

fa-vm (simple VM in C, from Felix Angell)
simple-vm (simple VM in C, from Bartosz Sypytkowski)