json-rpc2 JSON-RPC 2.0 server and client library, with HTTP, TCP and Websocket endpoints
nxt-api API request wrapper for NXT crypto for Node.js and the browser. It just has all the currently public API methods for NXT along side with a dual API Promise/Callback based interface. Plus it's created using Typescript, which should ensure the proper parame
promised-jugglingdb Dual API, promise based version of JugglingDB, the ORM for every database: redis, mysql, neo4j, mongodb, couchdb, postgres, sqlite
protosocket Hassle-free protobuffer for any type of server or client, TCP, TLS, HTTP or Websockets.
socket-express When realtime and stateless HTTP together, live happily ever after. HMVC framework built on top of Primus and Express.js for Node.js, inspired somehow by the simplicity of PHP Kohana framework (sorry, not another Rails clone for Node for you)
stratum Stratum protocol server and client for node.js
stratum-solo SHA256 coins (like Bitcoin) and Scrypt coins (like Litecoin) centralized solo mining pool. This "pool" just do the routing between daemons and the miners.