Templatical

React Email Editor is an open-source React component developed by Unlayer for embedding a drag-and-drop email editor in an application. It lets applications load and save email designs as JSON, listen for editor events, customize the editor configuration, add custom blocks, support translations, and export responsive HTML. The component is distributed through npm and renders client-side in the DOM; its README documents support for React 16.8 or later and Node.js 18 or later in version 2. It also offers an optional AI assistant.

json-render is a generative UI framework from Vercel Labs that converts natural-language prompts and structured JSON outputs into interface specifications constrained by a developer-defined catalog of components, actions, schemas, and data bindings. The catalog generates the AI system prompt and acts as a guardrail; specifications are validated against the catalog and rendered progressively through a streaming compiler. Components can use state expressions, conditional visibility, computed values, templates, actions, and state watchers. The framework provides renderers and adapters for React, Vue, Svelte, Solid, React Native, Next.js, TanStack Start, terminal UIs, Remotion video, React PDF, React Email, SVG/PNG images, and React Three Fiber, along with optional shadcn/ui components, devtools, state-store adapters, MCP Apps integration, YAML support, and code-generation utilities.

Shapeshift is a browser-based natural-language interface that turns one text input into structured cards such as events, checklists, timers, color pickers, bill splitters, converters, polls, contacts, and notes. Its intent layer can use TypeSafe AI's Jev model to answer typed questions in parallel, while deterministic parsers handle dates, amounts, units, and calculations; a built-in keyword classifier provides offline operation without an account. A state machine stabilizes changing classifications as text is entered, and saved cards remain in the browser's local storage until deleted. The open-source project is built with Next.js, React, TypeScript, and Tailwind CSS and is licensed under MIT.

Maildun is a self-hosted email platform for teams that combines audience management, email campaigns, transactional email, automations, and first-party engagement tracking in one application. It runs on the operator's infrastructure and sends workspace email through Amazon SES or SMTP, with audiences supporting custom attributes, tags, segments, CSV imports, double opt-in, and hosted subscribe forms. Campaigns use a visual editor and support reusable templates, scheduling, attachments, test sends, and engagement insights; transactional messages are exposed through a team-scoped, versioned JSON API; and event-driven automations use durable jobs that resume after restarts. It also provides SES bounce and complaint processing, optional local geolocation databases for tracking, team workspaces with roles and authentication features, Redis-backed queues, and an MCP server for AI-assisted workspace operations. The project is built with Laravel, Inertia, React, TypeScript, Redis, and Laravel Horizon, and is currently in beta. It is licensed under AGPL-3.0-only with additional attribution and naming terms.

Mailcheap is a self-hosted newsletter application built with Next.js that uses Amazon SES for email delivery. It provides an editor with live email preview, Markdown and raw HTML support, signup forms, unsubscribe handling, a public archive, campaign statistics, and an API for contacts and campaign drafts. Before sending, it checks requirements such as a subject, preview text, unsubscribe link, postal address, verified domain, and Gmail's message-size limit. Campaigns can be tested, scheduled, and sent in batches through Upstash QStash, with engaged readers sent first. SES delivery, bounce, and complaint events are received through Amazon SNS; bounced or complaining addresses are suppressed across newsletters, and a campaign pauses when its bounce or complaint thresholds are exceeded. The application uses MongoDB for contacts, campaigns, and statistics, and can optionally use Upstash Redis for shared rate limits and Vercel Blob for editor image uploads. It supports multiple newsletters in one installation and can expose archives on custom domains. The repository is an MIT-licensed, one-time open-source release with no support, disabled issues, and no planned updates.