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Open-source tools & agent skills to build the things you’re paying for.

Docker Mailserver

Project18.9K

Run a configurable SMTP and IMAP mail server in containers, with spam filtering, authentication, and mail-retrieval services.

Added 2026-10-07
Replaces
GitHub

What you can build

  • Build a tool that takes a CSV of requested addresses and produces a validation report and proposed alias configuration changes for review.
  • Build a policy-form editor that transforms a team's written routing choices into draft Sieve rules and a reviewable test-case list.
  • Build a utility that takes labeled spam and legitimate-message examples and produces candidate custom SpamAssassin rules for human review.
  • Build a read-only tool that compares a supplied LDAP account roster with a desired team map and outputs a list of mismatches for administrators.
  • Build a planner that takes a source-mailbox inventory and destination map and produces a staged retrieval plan plus a report of unmapped accounts.

Try this prompt

Build a small end-to-end alias-request compiler for Docker Mailserver. Accept a CSV of requested email addresses and aliases, validate the input, and produce a review report plus proposed configuration changes compatible with the project's documented alias support. Preserve the original input, never apply changes automatically, and clearly report invalid or duplicate requests. Include tests and a concise usage guide; do not invent Docker Mailserver commands or assume undocumented configuration interfaces.

Get started

  1. Read the version-matched setup guide

    Start with the official documentation linked from the README, including its basic installation tutorial. Follow guidance for the image version you intend to use.

  2. Review configuration options

    Consult the official environment-variable and account-management documentation linked from the README. The project describes configuration files rather than a SQL database.

  3. Plan upgrades and maintenance

    Use the official updating guidance linked from the README and keep your documentation version aligned with the image version in use.

License & notes

MITThe software is MIT-licensed and may be used commercially subject to the license notice. Self-hosting requires compute, storage, network access, and ongoing administration; domain and related infrastructure services may also cost money. No model requirement is documented. Costs for external services depend on what you choose; no prices are quoted here.

  • This is self-managed mail infrastructure, not a managed email-hosting service; operators must follow the version-matched setup and maintenance documentation.
  • The README describes basic Sieve support and custom spam rules, but does not document a graphical rule-authoring interface.
  • The documented service list does not establish calendar or contacts functionality.

Ollama

Project182.4K

Run open models on your machine and connect them to applications through a REST API.

Added 2026-10-07
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Immich

Project115.7K

Self-host a photo and video library with mobile backup, albums, search, and sharing.

Added 2026-10-07
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D3

Project113.8K

A low-level JavaScript toolkit for custom, data-driven graphics in SVG, Canvas, and HTML.

Added 2026-10-07
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Supabase

Project111.2K

Build Postgres-backed apps with authentication, APIs, realtime, storage, and functions.

Added 2026-10-07
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Whisper

Project110.1K

Build speech transcription, language identification, and translation workflows with an open-source model.

Added 2026-10-07
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GitHub

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Agent Skills

Agent skill102.3K

Structured engineering workflows for coding agents, from requirements to code review.

Added 2026-10-07
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GitHub

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Playwright

Project97.2K

Build cross-browser end-to-end tests and browser automation scripts with one API.

Added 2026-10-07
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GitHub

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LocalSend

Project93.6K

Send files and text between nearby devices over your local network, without an internet connection.

Added 2026-10-07
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Uptime Kuma

Project92.2K

Self-hosted checks for websites, network services, DNS, containers, and push monitors.

Added 2026-10-07
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Build local-first automations from device events, conditions, and actions.

Added 2026-10-07
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PaddleOCR

Project90.7K

Build OCR and document-parsing workflows that turn images and PDFs into structured data.

Added 2026-10-07
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Mermaid

Project90.6K

Create editable diagrams from Markdown-inspired text for documentation and JavaScript applications.

Added 2026-10-07
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GitHub

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Syncthing

Project89.2K

Synchronize files between two or more computers, then adapt local workflows around those folders.

Added 2026-10-07
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Netdata

Project80.8K

Open-source, real-time infrastructure monitoring with per-second metrics, anomaly detection, and alerting.

Added 2026-10-07
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Hoppscotch

Project80.6K

Develop APIs with reusable requests, collections, environments, and response tests.

Added 2026-10-07
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Impeccable

Agent skill78K

Design guidance and frontend checks for AI coding agents.

Added 2026-10-07
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Grafana

Project77.1K

Query, visualize, and alert on telemetry across data sources.

Added 2026-10-07
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Tesseract OCR

Project76.8K

An open-source OCR engine for extracting text from images and building document workflows.

Added 2026-10-07
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reveal.js

Project72.4K

An open-source HTML presentation framework for building browser-based slide decks.

Added 2026-10-07
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GitHub

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Vaultwarden

Project68.6K

Self-hosted Bitwarden-compatible server for personal and organization password vaults.

Added 2026-10-07
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Docling

Project68.5K

Convert diverse documents and media into structured content for tools you build.

Added 2026-10-07
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GitHub

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Apache ECharts

Project67.5K

Build interactive, customizable charts for browser applications.

Added 2026-10-07
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AnythingLLM

Project66.8K

Build a desktop or self-hosted AI workspace for document chat, agents, and recurring tasks.

Added 2026-10-07
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Prometheus

Project66.4K

Collect, query and alert on metrics from your services and systems.

Added 2026-10-07
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Traefik

Project65.1K

An HTTP reverse proxy and load balancer that updates service routes from infrastructure providers.

Added 2026-10-07
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GitHub

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FFmpeg

Project64.8K

Build workflows for inspecting, converting, filtering, and streaming audio and video.

Added 2026-10-07
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GitHub

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Scrapy

Project64.6K

Build Python crawlers that extract structured data from websites.

Added 2026-10-07
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GitHub

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last30days

Agent skill63.7K

Research recent public discussion across social platforms, community sites, and the web with an AI agent.

Added 2026-10-07
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Memos

Project63.6K

A self-hosted Markdown timeline for capturing, finding, and selectively sharing notes.

Added 2026-10-07
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GitHub

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Coolify

Project62.7K

Deploy applications, databases, and services on servers you control.

Added 2026-10-07
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GitHub

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PocketBase

Project61.3K

A self-hostable Go backend with embedded SQLite, realtime subscriptions, and built-in user and file management.

Added 2026-10-07
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GitHub

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Pi-hole

Project61.2K

Self-hosted DNS sinkhole for blocking unwanted content across a network.

Added 2026-10-07
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GitHub

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Penpot

Project60.8K

Design and prototype digital products with collaboration, open formats, and programmable workflows.

Added 2026-10-07
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Plane

Project60.5K

Open-source project management for issues, cycles, modules, roadmaps, and team documentation.

Added 2026-10-07
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Rclone

Project60.2K

Copy, sync, check, mount, and serve files across local storage and cloud providers.

Added 2026-10-07
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GitHub

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Build application search with full-text, semantic, or hybrid retrieval.

Added 2026-10-07
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Appwrite

Project57.6K

Build app backends with authentication, databases, storage, functions, messaging, and realtime APIs.

Added 2026-10-07
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GitHub

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Typst

Project56.5K

A markup-based typesetting system and local compiler for building repeatable document workflows.

Added 2026-10-07
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GitHub

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Ghost

Project55.5K

Open-source publishing software with memberships, subscriptions, newsletters, themes, and an API for custom content workflows.

Added 2026-10-07
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GitHub

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Odoo

Project54.9K

A modular suite of open-source business apps that can be combined into an ERP.

Added 2026-10-07
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