buildgen: Template renderer for our build system.
distrib: Scripts to distribute language-specific packages and other distribution-related helper scripts.
dockerfile: Docker files to test gRPC.
doxygen: gRPC C/C++ documentation generation via Doxygen.
gce: Scripts to help setup testing infrastructure on GCE.
gcp: Helper scripts for interacting with various services on GCP (like Google container engine, BigQuery etc)
internal_ci: Support for running tests on an internal CI platform.
interop_matrix: Scripts to build, upload, and run gRPC clients in docker with various language/runtimes.
jenkins: Support for running tests on Jenkins.
run_tests: Scripts to run gRPC tests in parallel.
run_tests/performance: See the README for more notes on the performance tests.