There are our experience: + Programming language: PHP, Javascript, Android, Swift,... + CMS & Framework: laravel, wordpress, joomla, codeigniter, symfony, cakephp,... + Webserver: apache, nginx, nodejs, litespeed, varnish cache,.. + Database: mysql, mongodb, casandra,... + Search engine: lucene, solr,... + Cache engine: Memcache, Redis,... + Log & test: bloom filter, hadoop, stomp, jmeter, graylog2,... + Scriptable browser: phantomjs, casperjs, seleniun,... + Browser extension: chrome, firefox,... + Mobile: android, swift, windows phone,...