A curated list of high quality coding style conventions and standards.

• Programming Languages
• Development Environment
• Platforms
• Content Management System
• Tools

• NASA C Style
• C Coding Standard
• C Programming/Structure and style

• C# Coding Conventions
• C# Style Guide
• C# Coding Standards and Naming Conventions

• Google C++ Style Guide
• C++ Core Guidelines - A set of tried-and-true guidelines, rules, and best practices about coding in C++.

• The Clojure Style Guide - A community coding style guide for the Clojure programming language.

• Style Guide
• Google Common Lisp Style Guide
• Common Lisp Style Guide

• The D Style - A set of style conventions for writing D programs.

• Effective Dart

• Elixir Styleguide

• Elm style guide

• Programming Rules and Conventions
• Erlang Coding Guidelines

• The F# Component Design Guidelines

• Effective Go

• Apache Groovy style guide

• Haskell Programming guidelines

• Code Conventions for the Java™ Programming Language
• Google Java Style Guide - Google's coding standards for source code in the Java™ Programming Language.
• Java Programming Style Guide

• JavaScript The Right Way - An easy-to-read, quick reference for JS best practices, accepted coding standards, and links around the Web.
• Google JavaScript Style Guide - This document serves as the complete definition of Google’s coding standards for source code in the JavaScript programming language.
• Airbnb JavaScript Style Guide - A mostly reasonable approach to JavaScript.
• jQuery Core Style Guide
• JavaScript Style Guides And Beautifiers
• JavaScript Style Guide and Coding Conventions
• Code Conventions for the JavaScript
• Javascript Clean Code - Software engineering principles, from Robert C. Martin's book Clean Code, adapted for JavaScript.

• Google JSON Style Guide
• JSON Style Guide

• Coding Conventions

• Lua Style Guide

• Google Markdown Style Guide - Style guide for Google-originated projects using Markdown.
• Markdown Style Guide

• .NET Standard
• .NET Secure Coding Guidelines
• .NET Naming Guidelines

• Objective-C Style guide - Style guide & coding conventions for Objective-C projects.
• Google Objective-C Style Guide
• NYTimes Objective-C Style Guide - The Objective-C Style Guide used by The New York Times.

• Coding style

• perlstyle
• Perl style guide

• PHP FIG - PHP Standards Recommendations.
• PHP The Right Way - An easy-to-read, quick reference for PHP best practices, accepted coding standards, and links to authoritative tutorials around the Web.

• Style Guide for Python Code
• Google Python Style Guide
• The Hitchhiker’s Guide to Python - Highly regarded Python best practices guide.

• Google's R Style Guide
• The tidyverse style guide

• How to Program Racket: a Style Guide

• Ruby Style Guide - Airbnb's Ruby Style Guide.
• Ruby Style Guide - A community-driven Ruby coding style guide.

• Rust Style Guide
• Rust Guidelines

• Scala Style Guide
• Databricks Scala Guide - Databricks Scala Coding Style Guide.
• Scala Best Practices

• Google Shell Style Guide - Style guide for Google-originated projects using Shell.

• API Design Guidelines
• Swift - A guide to our Swift style and conventions.
• Swift style guide
• Swift Style Guide - LinkedIn's Official Swift Style Guide
• Metova's Swift style guide

• Visual Basic Concepts
• Visual Basic/Coding Standards

• Google XML Document Format Style Guide

• Shell Style Guide

• Git Style Guide
• Few Rules from Git Documentation

• The PowerShell Best Practices and Style Guide - The Unofficial PowerShell Best Practices and Style Guide.

• Android Guidelines - Architecture and code guidelines we use at ribot when developing for Android.

• Apache Developers' C Language Style Guide

• HAL
• Microsoft REST API Guidelines
• JSON API - Recommendations
• API Security Checklist - Checklist of the most important security countermeasures when designing, testing, and releasing your API

• Arduino style guide
• API Style Guide for Arduino

• CSS Guildelines - High-level advice and guidelines for writing sane, manageable, scalable CSS.
• Frontend Guidelines - Some HTML, CSS and JS best practices.
• Sass Guidelines - An opinionated styleguide for writing sane, maintainable and scalable Sass.
• Airbnb CSS / Sass Styleguide - A mostly reasonable approach to CSS and Sass.
• HTML Style Guide - A style guide which helps you write better, performant, structured, scalable and maintainable HTML.
• HTML + CSS Code Guide - Standards for flexible, durable, and sustainable HTML and CSS.
• U.S. Web Design Standards - Open source UI components and visual style guide for U.S. government websites.
• CoffeeScript Style Guide - A collection of best-practices and coding conventions for the CoffeeScript programming language.
• LESS Coding Guidelines
• Google HTML/CSS Style Guide
• Guidelines for Responsive Web Design
• Yelp Styleguide

• GNU coding standards
• Making The Best Use of C - This chapter provides advice on how best to use the C language when writing GNU software.

• Linux kernel coding style

• Mozilla Coding Style Guide

• npm-coding-style
• Microsoft + Node.js Guidelines
• Node.js Style Guide - A guide for styling your node.js / JavaScript code.

• Mongo Style Guide

• Keep a CHANGELOG - Don’t let your friends dump git logs into CHANGELOGs™.
• Project Guidelines - A set of best practices for JavaScript projects.
• Semantic Versioning
• Indent style
• WebAppSec/Secure Coding Guidelines

• WordPress Coding Standards
• Drupal Coding Standards

• JavaScript Standard Style - One JavaScript Style to Rule Them All.
• Checkstyle - tool for checking Java source code for adherence to a Code Standard or set of validation rules.
• Conventional Changelog
• semantic-release
• North - Design and development standards to align and guide your project.

Contributions welcome! Read the contribution guidelines first.

To the extent possible under law, Wahyu Kristianto has waived all copyright and related or neighboring rights to this work.