An industrial-grade RPC framework used throughout Baidu, with 1,000,000+ instances(not counting clients) and thousands kinds of services, called "baidu-rpc" inside Baidu. Only C++ implementation is opensourced right now.
You can use it to:
Build a server that can talk in multiple protocols (on same port), or access all sorts of services
restful http/https, h2/gRPC. using http/h2 in brpc is much more friendly than libcurl. Access protobuf-based protocols with HTTP/h2+json, probably from another language.
redis and memcached, thread-safe, more friendly and performant than the official clients.
Extend brpc with the protocols used in your organization quickly, or customize components, including naming services (dns, zk, etcd), load balancers (rr, random, consistent hashing)
Try it!
Read overview to know where brpc can be used and its advantages.