Projects sharing features with Foundation Emails

Email-Boilerplate is an HTML email template framework and design system providing a foundational code structure for developing newsletters and transactional emails. It serves as a cross-client email layout library designed to ensure consistent rendering across diverse desktop and mobile email applications. The project utilizes a table-based layout library and reusable code patterns to maintain structural integrity within restrictive email rendering engines. It employs a responsive design system that combines fluid hybrid scaling and semantic markup normalization to resolve common rendering in

This project is an HTML email framework and compiler designed to build responsive emails using a high-level syntax that transforms into table-based layouts. It functions as an HTML-to-table compiler and CSS inliner, ensuring that simplified markup is converted into the complex nested structures and inline attributes required for cross-client compatibility. The framework features a responsive email grid system and Sass-based styling, allowing the use of variables to manage colors, typography, and spacing. These tools enable custom brand theming and the creation of fluid layouts that adapt to v

CssToInlineStyles is a CSS inliner for HTML emails that converts stylesheets into inline style attributes on HTML elements. It functions as a style resolver and transformation engine, mapping CSS selectors to HTML tags to ensure consistent visual rendering across diverse email clients and providers. The tool calculates final computed styles by applying specificity and inheritance rules before injecting the resolved properties directly into the style attributes of the corresponding HTML elements. It utilizes DOM-based style calculation and selector mapping to determine which declarations apply

MJML is a responsive email framework and HTML email compiler that translates simplified semantic markup into complex HTML. It functions as an email template engine designed to produce layouts that render consistently across a wide range of email clients. The system provides a markup validation tool to check structural integrity and syntax before compilation. It also includes a version migration utility to upgrade older template files to newer language versions while preserving content and layout structure. The toolset covers several capability areas, including command-line markup compilation

Heml is a framework providing a custom markup language and compiler designed to generate responsive HTML and CSS for consistent rendering across email clients. It functions as a system for transforming specialized markup strings into deliverable email templates and associated metadata. The project features a component system for defining reusable custom elements and style rules to standardize design patterns. It includes a responsive layout engine that converts flexible grid structures, columns, and rows into compatible fixed-width tables and fluid layouts. The toolset covers email metadata

Email-Blueprints is a modular email framework and HTML template library used to assemble custom email structures from a collection of reusable design patterns and blocks. It provides a system of flexible components for creating consistent email designs across diverse clients. The framework enables the creation of responsive layouts that adapt to various screen sizes and fixed-width designs for legacy email client compatibility. It also supports dynamic content templates that utilize merge tags to inject recipient-specific data for personalization. The project covers the development of cross-

Mailpit is an SMTP mail testing server and web-based email inbox designed to intercept and store outgoing emails for development and integration testing without delivering them to real recipients. It functions as an SMTP mocking tool and relay gateway, allowing users to capture mail traffic and view it through a browser interface. The project distinguishes itself by providing tools for SMTP server simulation, including the ability to inject failure codes to test application resilience. It also includes an email compatibility analyzer that validates HTML rendering, checks link integrity, and s

This project is a visual HTML email builder and responsive design tool used to create mobile-ready email layouts. It includes a dynamic email template engine and an artificial intelligence generator for drafting email copy and structural layouts. The system utilizes a component-based layout engine to build emails using standardized blocks and columns, which are translated into table-based HTML for compatibility across diverse email clients. It supports personalization through variable-based template interpolation and conditional logic to adjust content based on specific data sets. The platfo

Mailcatcher is a local email development proxy and SMTP server mock designed to intercept outgoing emails during development. It acts as a network bridge that catches outbound mail on a specified port and displays it in a web-based inspector instead of delivering messages to real recipients. The tool provides a web-based email viewer for reviewing HTML, plain text, and raw source content, along with an interface for inspecting headers and downloading attachments. It utilizes a RESTful JSON API to serve captured mail as structured data to the browser interface. The system includes a TCP socke

Critical is a tool for extracting and inlining the minimum CSS required to render above-the-fold content. It identifies the styles necessary for the initial visible portion of a page to reduce render-blocking requests and improve page load speed. The project generates resolution-specific stylesheets to optimize the initial paint across different device dimensions. It includes a utility to rebase asset URLs within extracted styles, ensuring that images and fonts load correctly when stylesheets are moved to different directories or content delivery networks. The tool provides a command-line in

This project is an HTML renderer that produces error pages styled after the familiar design of a standard CDN provider (such as Cloudflare). It accepts customizable parameters for error code, description, location, and request metadata, and outputs a self-contained HTML page that can be served directly by web servers or reverse proxies as a branded error response. The renderer is built using Go templates with built-in injection prevention, and it embeds all styling inline within the HTML head to eliminate external dependencies. It applies automatic whitespace minification to reduce output siz

Masonry is a JavaScript library for arranging elements of varying heights into a grid without vertical gaps. It serves as a DOM element positioner and dynamic layout manager that calculates and applies absolute coordinates to HTML elements based on available vertical space. The system functions as a responsive grid engine using percentage-based widths to maintain consistent structures across different screen sizes. It includes capabilities to recalculate grid positions after images load or browser windows resize to prevent element overlap. The library covers grid management and positioning,

Neat is a Sass grid framework and responsive layout system used to build fluid, column-based web architectures. It provides a structured approach to managing layout properties and global design settings through a central configuration map and a toolset of Sass mixins and functions. The system is distinguished by its ability to handle nested grid architectures, allowing flexible grids to be placed inside other grid containers while maintaining precise alignment and gutter control. It also includes development tools for frontend layout debugging that render background guide lines to visualize c

Skeleton is a lightweight responsive CSS boilerplate and mobile-first framework. It provides a foundation for building mobile-friendly websites through a fluid 12-column grid system, a minimal CSS reset library to normalize browser defaults, and default styling for raw HTML elements. The project emphasizes a mobile-first development approach, using percentage-based widths and predefined media queries to progressively enhance layouts for larger screens. It includes a utility-first library of single-purpose classes to manage common layout tasks such as floating elements, clearing, and width con

dom-to-image is a programmatic tool for capturing the visual state of HTML elements as downloadable images or raw image data. It functions as a DOM to image converter that renders specific nodes as base64 data URLs, binary blobs, or pixel arrays. The library transforms HTML elements into raster or vector images by utilizing the HTML5 canvas API. It can retrieve raw byte arrays of a DOM node for low-level image manipulation as an RGBA pixel data extractor. The project covers web content rasterization and the generation of dynamic screenshots from live HTML content. It handles the conversion o

Termui is a Go terminal user interface library used for building interactive dashboards and visual layouts within a command-line environment. It functions as a TUI layout engine, an interactive CLI framework, and a terminal data visualization toolkit. The library provides a set of specialized widgets for rendering charts, plots, gauges, and tables using character-based graphics. It includes a grid-based system for arranging interface elements using relative coordinates and proportional sizing to create structured displays. The toolkit covers a broad range of capabilities including data visua

This project provides educational course materials and reference code for learning frontend web development. It serves as a tutorial and collection of examples demonstrating how to build responsive user interfaces using HTML, CSS, and JavaScript. The repository contains practical implementations and references for responsive web design, specifically focusing on fluid grids and media queries to adapt layouts across different screen sizes. It includes client-side scripting samples that illustrate how to add interactive behavior and dynamic functionality to web pages. The material covers a broa

Grip is a GitHub API rendering tool and markdown previewer that transforms local markdown files into styled HTML. It functions as a converter for processing markdown text into HTML files and as a local server for verifying content appearance before it is committed to a repository. The project ensures visual parity with GitHub by using the GitHub API to render content, applying the specific styles used in repository comments, issues, and pull requests. It includes a mechanism to embed external CSS directly into generated HTML files for portable offline distribution and utilizes disk-based asse

Flexboxgrid is a responsive CSS framework and layout engine based on CSS3 standards. It provides a grid system that uses the flexbox model to arrange page elements into flexible, proportional grids that adapt to different screen sizes and device resolutions. The framework implements a float-free responsive design, utilizing a media-query breakpoint system to adjust layouts and column counts based on viewport width. It employs percentage-based column sizing and negative-margin guttering to maintain consistent spacing and fluid scaling across various displays. The system maps layout configurat

North is a responsive web design methodology and Sass-based CSS architecture framework. It provides a system for building mobile-first user interfaces using fluid grids and progressive enhancement techniques to ensure a consistent experience across different browser capabilities and screen sizes. The project features a standardized CSS naming system that uses Sass mixins to programmatically generate class names, distinguishing between components, layouts, and states. It also functions as a frontend project scaffolding tool, providing a generator to bootstrap new environments with pre-configur

Pure is a CSS UI framework and modular component library designed for building consistent web layouts and interface components. It functions as a responsive CSS grid system and a CSS reset library that normalizes default browser rendering to ensure a uniform appearance across different web environments. The project provides standalone styles for common interactive elements such as buttons, menus, forms, and tables. It utilizes a modular architecture that allows for the inclusion of specific style modules and employs namespace isolation to prevent visual conflicts between components. The fram

react-snap is a static site generator and single-page application prerenderer. It converts dynamic client-side components into static HTML files using a headless browser to improve search engine optimization and initial load speeds. The project features a headless browser crawler that automatically discovers application routes by following internal links. It includes a hydration optimizer that captures application state and caches network responses during the rendering process, embedding them directly into the HTML to synchronize the client-side application without re-fetching data. The tool

React Email is a development framework for designing and testing HTML emails using a library of modular components. It provides a set of reusable UI primitives that allow developers to build email templates through declarative code, ensuring consistent visual presentation across various desktop and mobile email service providers. The framework functions by transforming component trees into static HTML markup, automatically handling the complex requirements of email client rendering. It includes a built-in engine that extracts style declarations and injects them directly into HTML elements, by

Tera is a server-side rendering engine and template engine for Rust. It is designed to generate dynamic text by injecting data into predefined template files, utilizing a syntax compatible with Jinja2 and Django. The engine supports a variety of text generation tasks, including the creation of web pages via HTML rendering, the automation of email templates, and the production of environment-specific configuration files.

Sakura is a classless CSS framework and minimalist web theme that provides layout and component styles for plain HTML elements. It functions as a responsive dark mode theme, applying modern typography and spacing without requiring utility classes. The project serves as a CSS user style sheet that can be injected into external websites via bookmarklets or scripts to improve readability and modernize the visual standards of third-party pages. The framework includes a system for custom theme configuration through color and typography variables, automatic dark mode support based on system media

This project is a collection of React components that implement a responsive grid system using CSS Flexbox and CSS Modules. It provides reusable building blocks for constructing fluid interfaces that organize page content into flexible rows and columns, which automatically adjust their size and alignment based on viewport dimensions. The library distinguishes itself by decoupling style definitions from component logic, which facilitates consistent rendering across both server-side environments and client-side runtimes. By utilizing CSS Modules, it encapsulates styles into local scopes to prev

GoJS is a JavaScript diagramming library and canvas-based visualization engine used to build interactive flowcharts, organizational charts, and network diagrams. It functions as a data-driven framework that binds JavaScript data models to visual elements, enabling bidirectional synchronization between the underlying data and the graphical representation. The library features a comprehensive graph layout engine capable of automatically arranging nodes into trees, grids, circles, or force-directed layouts. It distinguishes itself through a template-based system for generating visual parts and a