2canSam (3) [Avatar] Offline
I was seeing the following error when I ran the browserify command.

[~/babelify_example]$ browserify src/index.js --transform babelify --outfile dist/bundle.js --debug
    throw err;

Error: Cannot find module 'babel-core'
    at Function.Module._resolveFilename (module.js:555:15)
    at Function.Module._load (module.js:482:25)
    at Module.require (module.js:604:17)
    at require (internal/module.js:11:18)
    at Object.<anonymous> (/Users/user/babelify_example/node_modules/babelify/index.js:2:14)
    at Module._compile (module.js:660:30)
    at Object.Module._extensions..js (module.js:671:10)
    at Module.load (module.js:573:32)
    at tryModuleLoad (module.js:513:12)
    at Function.Module._load (module.js:505:3)

Apparently, you need to add babel-core like so:
npm install --save-dev babel-core