Storekeeper: Steam bot with JSON-RPC interface
Travis CI – jsonrpc build list
zmq-jsonrpc for python
zmq-jsonrpc for ruby
zmq-jsonrpc for npm
ethereum json-rpc
Raptor JSON-RPC Client
Hadouken via json-rpc
“Hadouken is a headless BitTorrent client for Windows. It is written in C# and is designed to run as a Windows Service managed through a built-in web interface.” – http://docs.hdkn.net/en/latest/jsonrpc_methods.html