You might already know that ForgeRock’s platform is built on open source software. We have been using Stash, now BitBucket, to host the git repos and to manage the review process.
If you want to read the code or the doc source code, you will find the canonical copies on that server. For example—there are more repos on the server, but here are some of the most popular links:
You will also find read-only mirrors (and other goodies) at GitHub, under https://github.com/ForgeRock:
Either server is fine if you just want to read the code or clone a repo.