• Install: npm install bootstrap-brand-buttons
• Include dist/brand-buttons.min.css to your file: <link rel="stylesheet" src="dist/brand-buttons.min.css">
• Use as Bootstrap button: <button class="btn btn-facebook">Facebook</button> or <a href="" class="btn btn-facebook">Facebook</a>
• You can:
• Use different sizes: btn-xs, btn-sm, btn-lg or btn-block
• Use with Font Awesome: <a href="" class="btn btn-facebook"><i class="fa fa-facebook"></i> Facebook</a>
• Or anything else you prefer to do with Bootstrap buttons!

• Clone repository git clone https://github.com/evgenyrodionov/bootstrap-brand-buttons.git
• Install Grunt.js and CoffeeScript (globally): npm install -g grunt-cli coffee-script
• Go to project cd bootstrap-brand-buttons, install dev dependencies: npm install
• Run grunt serve or grunt build

MIT

You can request new button as issue or pull request. Also I have Gumroad for donate.