1.c. Utilities: Developing for the web

From this excellent answer: Quora

Front-end:

• HTML5 boilerplate - http://html5boilerplate.com
• JqueryUI - http://jqueryui.com/
• AngularJS - http://angularjs.org/
• Backbonejs - http://backbonejs.org/
• EmberJS - http://emberjs.com/
• CanJS - http://canjs.com/
• YUI library - http://yuilibrary.com/
• Twitter Bootstrap - http://twitter.github.com/bootst...
• Gumby framework - http://gumbyframework.com/
• xchema xtyle - http://xtyle.xchema.com
• NinjaUI - http://ninjaui.com/
• CoffeeScript - http://coffeescript.org/
• Stylus css - http://learnboost.github.com/sty...
• Less css - http://lesscss.org/
• SaSS css - http://sass-lang.com/
• Cappuccino - http://cappuccino.org/
• Jasmine - http://pivotal.github.com/jasmine/
• Mocha - http://visionmedia.github.com/mo...
• QUnit -http://qunitjs.com/
• CodeKit - http://incident57.com/codekit/
• Grunt - https://github.com/cowboy/grunt
• Yeoman - http://yeoman.io/
• ComponentJS - http://component.io/
• TodoMVC - http://todomvc.com/

Back-end:

##Servers and networking:

• Vagrant (virtualization) - http://vagrantup.com/
• Puppet (automation) - http://puppetlabs.com/
• ZeroMQ (sockets) - http://www.zeromq.org/
• RabbitMQ (messages) - http://www.rabbitmq.com/

PHP:

• Laravel Framework - http://laravel.com/
• CodIgniter Framework - http://codeigniter.com/
• Wordpress Framework - http://wordpress.org/
• Joomla Framework - http://www.joomla.org/

JavaScript:

• nodeJS - http://nodejs.org/
• Express Framework - http://expressjs.com/
• Socket.io - http://socket.io/
• Meteor - http://www.meteor.com/
• Derby - http://derbyjs.com/
• TowerJS - http://towerjs.org/
• Geddy - http://geddyjs.org/
• Mojito - https://developer.yahoo.com/cocktails/mojito/

Python:

• Flask - http://flask.pocoo.org/
• Django - https://www.djangoproject.com/

Ruby:

• Rails - http://rubyonrails.org/
• Sinatra - http://www.sinatrarb.com/

Java:

• Hibernate (ORM)- http://www.hibernate.org/
• Play framework - http://www.playframework.org/