sqlbolt.com - SQLBolt - Learn SQL - Introduction to SQL

Daily visitors: 12 552

Keywords: mysql, lessons, sql, postgres, javascript, sqlite, learn sql, interactive, tutorial, learn

regexone.com - RegexOne - Learn Regular Expressions - Lesson 1: An Introduction, and the ABCs

Daily visitors: 6 943

Keywords: regexp, Regex, javascript, interactive, tutorial, regular expressions, learn, regex tutorial, regex whitespace, learn regex

vimconfig.com - VimConfig - Sane and simple Vim configuration

Keywords: tabs, configuration, configure, vim, vimrc, line numbers, vim config, vim configuration, generate vimrc, basic vimrc