Documentation

Official API docs detail the node API.

Node Manual offers stylized API docs, as well as tutorials and live code samples

Node Bits provides sample Node.js projects

docs.nodejitsu.com answers many of the common problems people come across.

How To Node has a growing number of useful tutorials.

Stack Overflow node.js tag collects new information every day.

GitHub

All development takes place at http://github.com/joyent/node. The comments on commit messages are often source of heated discussion regarding core development.

The GitHub Node wiki is full of useful links for newcomers. Don't miss Projects, Applications, and Companies Using Node or the very long list of Node modules, many of which are published in the npm registry.

Mailing List

The mailing list is used for announcements, discussion, and flame wars about Node.

Periodicals

Planet Node is an aggregator of Node developer blogs.

NodeUp is a podcast covering the latest Node news in the community.

Conferences

NodeConf conferences are the main event in the United States; they are organized by Mikeal Rogers.

Node Dublin is a Node conference in Dublin Ireland, organized by Cian O'Maiden.

NodeFest (東京Node学園祭) is organized by the Node.js Japan user group.

NodeCamp.de in Cologne, Germany is organized by Rails Love.

An Italian Node.js Conference exists as well.

Node Summit is a conference in San Francisco focusing on the adoption of Node in larger companies.

JSConf organizes the main JavaScript conferences.

Localized Sites

nodejs.org does not maintain any translations into other languages. However there are community websites in various languages with mailing lists and translations of the website.

nodejs.ru Russian blog.
nodejs.ir Iran group in Persian
nodejs.jp Japan user group
CNodeJS.org Chinese community
nodejs.co.il Israeli wiki
HKNoJ Hong Kong community
nodejs.tw Taiwan community
Node Hispano Spanish language community
Node.js Español Node.js in Spanish
OctoberSkyJs Korea Node.js community
FR . Node.js Google+ Community of Node.js French users Node.js Türkiye Node.js in Turkish

IRC

For real-time chat about Node development go to irc.freenode.net in the #node.js channel with an IRC client or connect in your web browser to the channel using freenode's WebChat.