Awesome Virtual Machines

Java-related

• Jalapeño
• Joeq
• https://github.com/JikesRVM/JikesRVM
• SableVM
• Maxine VM: wikipedia, github
• GraalVM

Python-related

• PyPy
• byterun
  • http://aosabook.org/en/500L/a-python-interpreter-written-in-python.html

Perl-related

• https://github.com/parrot/parrot
• https://github.com/MoarVM/MoarVM

Smalltalk-related

• SOM - Implementations in many languages

General

• https://github.com/eclipse/omr
  • "The Eclipse OMR project is a set of open source C and C++ components that can be used to build robust language runtimes that support many different hardware and operating system platforms."
• WebAssembly
• LLVM
• https://code.google.com/archive/p/gvmt/
• zetavm - "Multi-Language Platform for Dynamic Programming Languages"
• Mu Micro Virtual Machine
• VMKit - Based on LLVM 3.3