Baseline for front-end developers

http://rmurphey.com/blog/2012/04/12/a-baseline-for-front-end-developers/
Javascript
Git
Modularity, dependency management, and production builds
In-Browser Developer Tools
The command line
Client-side templating
CSS preprocessors
Testing (Jasmine/Mocha)
Process automation (rake/make/grunt/etc.)
MDN (The fine manual)

http://rmurphey.com/blog/2015/03/23/a-baseline-for-front-end-developers-2015/
Javascript (ES6, BabelJS)
Modules & Build Tools (AMD, requirejs, browserify, systemjs)
Testing (Karma, Intern)
Process Automation (Grunt, Gulp, Yeoman, Broccoli)
Code quality (ESlint, JSCS)
Git
Client-Side Templating
Node (MEAN, express)