Translations:Relevant Developer Tutorials/8/en

• Source Trail - get quick overview of an unfamiliar codebase (like Mudlet, if you're just joining here)
• draw.io - Draw and share diagrams online
• http://www.rexex101.com/ - test and explain your regular expressions online
• http://www.rexegg.com/regex-quickstart.html - a good little cheat sheet for regex