Best email and calendar skills for AI agents

The world's best AI personal assistant for email. Open source app to help you reach inbox zero fast.

Excellent quality, 11K stars, and a 23 use-case fit score.

The open-source communication infrastructure for agents and products

Excellent quality, 39K stars, and a 21 use-case fit score.

A lightweight alternative to OpenClaw that runs in containers for security. Connects to WhatsApp, Telegram, Slack, Discord, Gmail and other messaging apps,, has memory, scheduled jobs, and runs directly on Anthropic's Agents SDK

Excellent quality, 30K stars, and a 21 use-case fit score.

280+ free n8n automation templates — ready-to-use workflows for Gmail, Telegram, Slack, Discord, WhatsApp, Google Drive, Notion, OpenAI, and more. AI agents, RAG chatbots, email automation, social media, DevOps, and document processing. The largest open-source n8n template collection.

Excellent quality, 23K stars, and a 20 use-case fit score.

The official Lark/Feishu CLI tool, maintained by the larksuite team — built for humans and AI Agents. Covers core business domains including Messenger, Docs, Base, Sheets, Calendar, Mail, Tasks, Meetings, and more, with 200+ commands and 20+ AI Agent Skills.

Excellent quality, 15K stars, and a 20 use-case fit score.

Tuta is an email service with a strong focus on security and privacy that lets you encrypt emails, contacts and calendar entries on all your devices.

Excellent quality, 7.7K stars, and a 19 use-case fit score.

A curated list of resources and tools for enhancing Claude AI workflows.

Excellent quality, 66K stars, and a 18 use-case fit score.

Apache Airflow - A platform to programmatically author, schedule, and monitor workflows

Excellent quality, 46K stars, and a 18 use-case fit score.

Your AI second brain. Self-hostable. Get answers from the web or your docs. Build custom agents, schedule automations, do deep research. Turn any online or local LLM into your personal, autonomous AI (gpt, claude, gemini, llama, qwen, mistral). Get started - free.

Excellent quality, 35K stars, and a 18 use-case fit score.

Open-source live-chat, email support, omni-channel desk. An alternative to Intercom, Zendesk, Salesforce Service Cloud etc. 🔥💬

Excellent quality, 32K stars, and a 18 use-case fit score.

The classic email sending library for PHP

Excellent quality, 22K stars, and a 17 use-case fit score.

Temporal service

Excellent quality, 21K stars, and a 17 use-case fit score.

💌 Build and send emails using React

Excellent quality, 19K stars, and a 17 use-case fit score.

MJML: the only framework that makes responsive-email easy

Excellent quality, 18K stars, and a 17 use-case fit score.

:love_letter: A beautiful, fast and fully open source mail client for Mac, Windows and Linux.

Excellent quality, 18K stars, and a 17 use-case fit score.

✉️ Send e-mails with Node.JS – easy as cake!

Excellent quality, 18K stars, and a 17 use-case fit score.

Mail-in-a-Box helps individuals take back control of their email by defining a one-click, easy-to-deploy SMTP+everything else server: a mail server in a box.

Excellent quality, 15K stars, and a 17 use-case fit score.

BillionMail gives you open-source MailServer, NewsLetter, Email Marketing — fully self-hosted, dev-friendly, and free from monthly fees. Join the discord: https://discord.gg/asfXzBUhZr

Excellent quality, 15K stars, and a 17 use-case fit score.

Thunderbird for Android – Open Source Email App for Android (fka K-9 Mail)

Excellent quality, 14K stars, and a 17 use-case fit score.

Low-code platform allows you to build business apps, enables you to quickly create internal tools such as dashboard, crud app, admin panel, crm, cms, etc. Supports PostgreSQL, MySQL, Supabase, GraphQL, MongoDB, MSSQL, Rest API, Hugging Face, Redis, etc. Automate workflows with schedule or webhook. Open source Retool.

Excellent quality, 12K stars, and a 17 use-case fit score.

🧑‍🚀 Authentication and authorization infrastructure for SaaS and AI apps, built on OIDC and OAuth 2.1 with multi-tenancy, SSO, and RBAC.

Excellent quality, 12K stars, and a 17 use-case fit score.

A Cloudflare-based email service | 基于 Cloudflare 的邮箱服务 | Cloudflare Email 邮箱 Mail

Excellent quality, 11K stars, and a 17 use-case fit score.

Experience email the way you want with Mail0 – the first open source email app that puts your privacy and safety first. Join the discord: https://mail0.link/discord

Excellent quality, 11K stars, and a 17 use-case fit score.

Low code web framework for real world applications, in Python and Javascript

Excellent quality, 10K stars, and a 17 use-case fit score.

Leantime is a goals focused project management system for non-project managers. Building with ADHD, Autism, and dyslexia in mind.

Excellent quality, 10K stars, and a 17 use-case fit score.

CloudFlare free temp domain email 免费收发 临时域名邮箱 支持附件 IMAP SMTP TelegramBot

Excellent quality, 10.0K stars, and a 16 use-case fit score.

Web dashboard for Hermes Agent — multi-platform AI chat, session management, scheduled jobs, usage analytics

Excellent quality, 8.9K stars, and a 16 use-case fit score.

Prometheus Alertmanager

Excellent quality, 8.5K stars, and a 16 use-case fit score.

Web dashboard for Hermes Agent — multi-platform AI chat, session management, scheduled jobs, usage analytics

Excellent quality, 8.0K stars, and a 16 use-case fit score.

Dolibarr ERP CRM is a modern software package to manage your company or foundation's activity (contacts, suppliers, invoices, orders, stocks, agenda, accounting, ...). it's an open source Web application (written in PHP) designed for businesses of any sizes, foundations and freelancers.

Excellent quality, 7.3K stars, and a 16 use-case fit score.