The heart of the PyPy project is the github repo pypy with the code for RPython and PyPy. The main branch
has the code for PyPy2.7 and the py3.11 branch has the current latest version of the PyPy3.11 interpreter.
In addition
- https://foss.heptapod.net/pypy/buildbot has the buildbot code that runs the CI
- https://foss.heptapod.net/pypy/benchmarks has the benchmarks and runners behind speed.pypy.org