react-spring is an animation library for React that uses spring physics rather than duration and curve parameters. It supports fluid UI and interaction animations, SSR, and runs animations without re-rendering via an imperative API.
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readme.so is an online tool that provides a markdown editor and pre-made templates to help users create readme files for their software projects. The platform is developed by Katherine Oelsner and simplifies the process of adding and customizing required sections for project readmes.
Real-Debrid is an unrestricted downloader that lets users download files hosted on the Internet or stream them into a web player. It offers lower pricing than most file hosters and access to a wide range of hosters.
An Appcues-powered gallery of UX examples covering onboarding tours, in-app feature announcements, user surveys and signup flows, alongside articles and a podcast featuring product and design experts. It is aimed at people seeking inspiration for mobile and web product experiences.
Realtime Colors is a web tool for visualizing color palettes and fonts on a real website. It stores the selected colors, includes a contrast checker, and allows exporting in formats such as .zip, .png, CSS and SCSS. The source also lists a Figma plugin and VS Code.
RecipeRadar is free and open source software that helps users search for recipes by ingredients, plan meals and create food shopping lists. Its stated aims include reducing food wastage and supporting healthy, economical eating habits. The project is registered as a Community Interest Company in the United Kingdom.
A cookbook of curl command recipes, created by Browserling, covering common tasks such as making POST and GET requests, adding POST data, constructing query strings, and setting HTTP headers. It also lists arguments for cookies, redirects, authentication, proxies, and saving responses to files.
Recoll is a desktop document search application for Unix, Linux, Microsoft Windows and MacOS, built on the Xapian search engine library. It finds documents based on their contents as well as their file names and can search most document formats. The software is free on Linux, open source, and licensed under the GPL.
Red Blob Games publishes interactive visual explanations of math and algorithms, using examples from computer games and other projects. Topics include pathfinding, map generation from noise, hexagonal grids, Voronoi diagrams, graph theory and 2D visibility. Articles are free, with no signup and no ads, aimed mainly at independent, student and hobbyist software developers. The site also hosts demos such as map generators.
A DNS-based URL redirection service. Two DNS records describe a redirect: a CNAME or A record points the hostname at the service server, and a TXT record gives the redirect rule. Rules support permanent and temporary redirects, path matching and wildcards, and destinations can use http, https, ftp, mailto, magnet or absolute paths. HTTPS certificates are issued automatically by Let's Encrypt.
ReDoc helps developers write, search, review, test, or manage code and projects.
A web hosting provider offering free web hosting along with shared, semi-dedicated and VPS hosting, domain registration, SSL certificates and site-building tools such as the Zacky Website Builder and app installer. Support is offered around the clock, with automatic data backups and a multi-domain shared hosting setup.
CheatSheets.zip is a repository of quick reference sheets and cheat sheets for developers, described as crafted by the open community. It lists cheat sheets covering topics such as AI tools, programming languages, operating systems, databases and keyboard shortcuts.
Reference is a GitHub repository or organization with source code, releases, documentation, or project resources.
refined-github is a GitHub repository or organization with source code, releases, documentation, or project resources.
An experimental, largely visual and example-based open source online book about regular expressions. It is intended for regex beginners with some programming experience and covers basics such as character classes, escapes, groups, repetition, alternation, flags, anchors and lookaround. A single-page version is available for printing.
RegexLearn provides developer documentation, references, tutorials, or learning resources.
RegexOne provides a set of interactive lessons and exercises to help you learn regular expressions. The lessons cover topics such as matching specific characters, character ranges, optional characters, whitespace and groups, and the site also includes practice problems and language guides.
RelaGit is a graphical Git client built with SolidJS and Electron, available for Windows, macOS, and Linux. It provides extensible workflow and theme APIs for managing source code, and integrates with GitHub, GitLab, and Codeberg. Downloads are labeled Beta, and macOS 10.14 or later is required.
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.
Remotion is a tool for creating videos and motion graphics with React. It supports using coding agents, bulk rendering, server-side and client-side rendering, and building applications such as a player or editor starter. A free license covers individuals and companies of up to 3 people. System requirements include Node 16 or Bun 1.0.3, with macOS 15 or later required.
Remotly is remote desktop software for connecting to computers, with encoding, encryption and access control features. The site lists Pro, Admin, Support and Ultra-High Quality plans alongside a free option, with prices per user per month.
Renderforest is an AI-powered creative platform for making videos, designs, and websites. It offers AI video, image, and audio generation, over 1200 video templates, an AI video editor, AI website builder, and logo generator. The pricing page lists Lite, Pro, and Business plans, with a free plan available.
Reocities is a free host for hand-made websites, offering a subdomain, a file manager, a visual builder and optional tooling. Sites are static, serving HTML, CSS, JavaScript, images, audio and video as uploaded files. It also provides an HTTP API, an MCP server and optional custom domains and visitor translation.