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EditorConfig is a file format and a collection of text editor plugins for keeping coding styles consistent across different editors and IDEs. An .editorconfig file defines style rules that plugins read and apply.
GNU Emacs is a free/libre, extensible and customizable text editor. Its core is an interpreter for Emacs Lisp, and it offers content-aware editing modes with syntax coloring, built-in documentation and a packaging system for installing extensions. It also provides functionality beyond text editing, such as a project planner, mail and news reader, debugger interface and calendar.
Float UI provides responsive website templates and UI components for React, Vue, Svelte and HTML built with Tailwind CSS. It describes the components as free and open-source and as copy-and-paste ready, alongside professional templates built on React and Next.js with Tailwind CSS.
For the Badge creates custom SVG badges for projects. It offers a visual generator for badge design and a REST API that returns badges via query parameters. The project is open source, and badges can be exported as SVG or copied as markdown for use in READMEs.
HexEd.it is a free hex editor that runs in a web browser using HTML5 and JavaScript technology. It is intended for Windows, MacOS, Linux and other modern operating systems, and lets users analyse hexadecimal binary dumps and files and read, manipulate, write, import and export byte as well as bit data.
jsdfe is a JavaScript deobfuscator built on nodejs and babel. Its purpose is to make obfuscated scripts easier to read and help users understand their roughly behavior. It is not intended to reproduce the original code or output executable code. The developer created it for personal use and notes that it often terminates with an uncaught error, may go into an infinite loop, and runs target code in a VM without considering security.
Melody is a language that compiles to ECMAScript regular expressions, with the goal of being more readable and maintainable. It can be installed via Cargo or from source, and a playground allows trying it in the browser.
Neon is a serverless backend platform built on Lakebase Postgres, offering Postgres databases with branching and autoscaling alongside authentication, object storage, functions and an AI gateway. Environments can be created and branched via MCP, CLI and SDK, and services are described as instant, branchable and agent-ready.
Read practical guidance on starting and contributing to open-source projects.
A guide to design patterns in the Python programming language by Brandon Rhodes, covering Gang of Four principles, creational, structural and behavioral patterns, and Python-specific patterns. The author states progress is intermittent and directs readers to the site's GitHub commit history for new material.
React Suite is a suite of React components for building enterprise applications. It features 80+ components, responsive design, dark mode, internationalization, accessibility support, and TypeScript-ready code, and is free and open source. It can be installed with npm and used across frameworks including Next.js, Vite and Create React App.
Remarkbox is an open source comment system built to engage readers with content. It is a hosted comments service that embeds in pages, without ads or tracking, and offers Markdown and syntax highlighted code blocks.
Roslyn Quoter is a browser-based tool that parses C# code and generates Roslyn syntax factory calls. It offers options for parse type, parenthesis placement, whitespace preservation, redundant API calls, and ready-to-run output with compilation and diagnostics. The project is open-source on GitHub.
An index of independent tech blogs covering JavaScript, CSS, DevOps, Python and related topics, written by people who build things. The page also lists free developer tools and reading maintained by Marko Denic, including web development resources, an article banner tool, a snippet editor, code tools and a JavaScript quiz.
A platform-agnostic specification of the technical features a good website should have, built in the open under an MIT licence. It covers 177 topics across ten areas, including foundations, SEO, accessibility, security, performance and privacy, and offers a yes/no checklist for auditing a site. An open, read-only MCP server lets agents query the specification.
DFIR tool for parsing URLs, timestamps, IDs, and encoded values into readable investigation clues.
Wireflow is a free, online and open source tool for creating user flow prototypes without Photoshop skills. It offers 125 ready-made wireframe screen templates, groups and notes, and export to PNG or JPG. The project is MIT licensed and runs in the browser.
