package.json examplefrom: http://blog.nodejitsu.com/package-dependencies-done-rightsee also: http://package.json.nodejitsu.com/

package.json

{
  "name": "best-practices",
  "description": "A package using versioning best-practices",
  "author": "Charlie Robbins <charlie@nodejitsu.com>",
  "main": "my-module.js",
  "repository": {
    "type": "git",
    "url": "https://github.com/npm/npm.git"
  },
  "dependencies": {
    "colors": "0.x.x",
    "express": "2.3.x",
    "optimist": "0.2.x"
  },
  "devDependencies": {
    "vows": "0.5.x"
  },
  "engine": "node >= 0.10.26"
}