Sparrow

Sockudo is a self-hosted, high-performance Rust real-time server for WebSocket and HTTP publishing. It targets strict Pusher Protocol V1 compatibility for drop-in use, while Protocol V2 adds Sockudo-native events, serials, message IDs, recovery, rewind, tags, deltas, annotations, and mutable message events. The platform supports durable history, hot replay buffers, two-tier recovery, presence history, push notifications, webhooks, rate limiting, TLS, Prometheus metrics, Docker Compose, and Helm. Horizontal fanout can use Redis, Redis Cluster, NATS, RabbitMQ, Google Pub/Sub, Kafka, Pulsar, or Apache Iggy. The monorepo includes the Rust server and workspace crates, dashboards, deployment assets, documentation, official real-time and server SDKs, and an optional AI Transport SDK.

Boop is a tiny, self-hosted notification inbox for developers. Applications submit events to a Go server using a project API key; the server redacts configured sensitive keys, stores the events in SQLite, and sends push notifications directly to Apple's APNs. The notification contains the title, body, and event ID, while the iOS app fetches the full event from the server using a device credential. The bundled web UI manages projects, devices, pairing, retention, silences, and event grouping. A one-time pairing token and QR code connect the iOS app, which must be built and signed by the operator. Events support levels, structured error data, up to three URL actions, fingerprints for grouping repeated occurrences, and a Sentry-compatible ingest endpoint. Boop also exposes an optional read-only, Streamable HTTP MCP endpoint for AI agents to query projects and events; it contains no LLM. Distribution consists of a Go binary with an embedded Svelte web UI, a Docker deployment, and the iOS app source. The project uses one SQLite database file, has no hosted relay, account system, or telemetry, and is released under the MIT license.

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.

Gofer is a self-hosted, web-based email client for managing multiple Gmail, Outlook, iCloud, and IMAP/SMTP accounts on a personal machine or server. It combines mail, contacts, and calendar, with support for threads, labels, scheduled sending, signatures, translation, search, mailbox export and import, account-to-account mail movement, and synchronization with Google, Outlook, CardDAV, and CalDAV. It is built with Go, templ, HTMX, Tailwind CSS, and SQLite, and can be run from a released binary or Docker image. The project is pre-1.0 and supports single-profile, protected-profile, and multi-user deployments, with encrypted credentials, blocked remote images, and passkey or TOTP MFA.

SnagTime is a free, self-hostable scheduling application that provides account and workspace management, event types, availability rules, public booking links, time-zone handling, custom booking questions, rescheduling, cancellation, and recovery links. It checks Google Calendar free/busy status and can create calendar events, sends organizer and invitee messages through SMTP, and supports Stripe Checkout in test mode with webhook confirmation and refund handling. The local demo uses SQLite, a local calendar adapter, a local email inbox, and stub payments; production deployments use a PostgreSQL architecture with a web service, background worker, persistent database, and webhook endpoints. The application is a Next.js project with Prisma schemas and migrations, distributed under the MIT License. It is intended for self-hosting rather than as a managed service; external Google Calendar, SMTP, Stripe, hosting, domain, and database services must be supplied and configured by the operator.