Listed below are the tools we’ve been using when we are building stuff for the web, hope you may find it useful and helpful for you as well:
REM Calculator CSS – Tool to calculate the rem sizes
dopethemes.com/rem-calculator-css
Composer – Dependency Manager for PHP
getcomposer.org
Node.js – Package ecosystem of open source libraries
nodejs.org
PHPUnit – Testing framework for PHP
phpunit.de
Vagrant – Virtual machine environments for workflow and automation
www.vagrantup.com