Binary Data Representation (serialization format)
LEB128 utilities for Node
Type predicates and assertions for Node
Stream and pipe utilities for Node
Just add Daemon Sauce to turn your app into a daemon.
Additional helpers and assertions for nodeunit, particularly optimized for Q
Logging library that allows for hierarchical loggers, multiple log levels, and flexible watching of log records.
Closure Node Package Checker, a type-checker for NodeJS programs
RSA public/private key OpenSSL bindings for node and io.js
Easy unit testing for node.js and the browser. Medium fork of nodeunit