Riot : Riot allows teams to communicate across a wide range of collaboration apps. If some team members use Riot while others use IRC, Slack or Gitter, Riot ...
Keycloak : Keycloak is an Open Source Identity and Access Management solution for modern Applications and Services.
Zulip : Powerful slack-like open source group chat
Tiny Tiny RSS : Tiny Tiny RSS is a free and open source web-based news feed (RSS/Atom) reader and aggregator.
SimpleLogin : With email aliases , you can be anonymous online and protect your inbox against spams and phishing. Open-source.
Open source meeting scheduling tool. Send a link, let others book a slot. Calendly alternative.
Maily Herald : Maily Herald is a Ruby on Rails engine that helps you send and manage your mailings.
Think of Maily as a self-hosted Mailchimp® you can easily integra...
Novu : The open-source notifications infrastructure. A fully-featured microservice to send SMS, E-mail, Slack and Push notifications. Embeddable notification...
SimpleLogin : With email aliases , you can be anonymous online and protect your inbox against spams and phishing. Open-source.
Mailtrain : Mailtrain is a self hosted newsletter application built on Node.js (v5+) and MySQL (v5.5+ or MariaDB). Mailtrain supports subscriber list management, ...
cal.com : Open source meeting scheduling tool. Send a link, let others book a slot. Calendly alternative.
A set of Ansible playbooks to build and maintain your own private cloud: email, calendar, contacts, file sync, IRC bouncer, VPN, and more.