Our submodules point to repositories in the getsentry org. Either they are Sentry repos, or forked into the org.
Fork getsentry/Ben.Demystifier. From the popular library from Ben Adams: Ben.Demystifier
The commit checked out on this fork always has changes applied after running the make-internal.sh script. To make sure we're not exposing any API from that library externally.
Fork getsentry/perfview.
Tool from the .NET team which includes several utilities used for profiling .NET code.
We use that in our Sentry.Profiling
package.