How to: <a id="tag-communication" href="#tag-communication">Communication</a>
1. **Abilian SBE** - ([Repo](https://github.com/abilian/abilian-sbe), [Home](https://www.abilian.com/)) A "Social Business Engine" with features including lightweight document management, discussions, wikis, timelines, and more. `(cms, server)`
  1. **Askbot** - ([Repo](https://github.com/ASKBOT/askbot-devel), [Home](https://askbot.com/)) Q&A web platform similar to StackOverflow, complete with tagging, reputation, badges, and more. `(server, corp)`
  1. **Bitmessage** - ([Repo](https://github.com/Bitmessage/PyBitmessage), [Docs](https://bitmessage.org/wiki/Main_Page)) Reference client for Bitmessage, a peer-to-peer encrypted decentralised communication protocol. `(linux, windows, mac, kivy, qt4, tui)`
  1. **Bookwyrm** - ([Repo](https://github.com/bookwyrm-social/bookwyrm), [Home](https://bookwyrm.social/)) Social reading and reviewing, decentralized with ActivityPub. `(internet, organization, server, django)`
  1. **Collaborate** - ([Repo](https://github.com/propublica/django-collaborative), [Docs](https://propublica.gitbook.io/collaborate-user-manual)) Web-based collaboration tool designed by [Propublica](https://www.propublica.org/nerds/making-collaborative-data-projects-easier-our-new-tool-collaborate-is-here) for newsrooms to share datasets, with a workflow built around assigning tips and maintaining contacts. `(organization, server)`
  1. **dak** - ([Repo](https://salsa.debian.org/ftp-team/dak)) Collection of programs used to maintain the Debian project's email archives. `(linux)`
  1. **Django Wiki** - ([Repo](https://github.com/django-wiki/django-wiki), [Demo](https://demo.django-wiki.org/), [Docs](https://django-wiki.readthedocs.io/en/latest)) A simple and mature web-based wiki. `(server)`
  1. **Docassemble** - ([Repo](https://github.com/jhpyle/docassemble), [Home](https://docassemble.org/), [Docs](https://docassemble.org/docs.html)) Platform for creating mobile-friendly web-based interviews, collecting responses, and much more. `(server)`
  1. **Formspree** - ([Repo](https://github.com/formspree/formspree), [Home](https://formspree.io/)) Web server which turns an HTML form submission into an email, without registration, JavaScript, or custom Python. `(server, corp)`
  1. **Gajim** - ([Repo](https://dev.gajim.org/gajim/gajim), [WP](https://en.wikipedia.org/wiki/Gajim)) Lightweight, cross-platform instant messaging client for the XMPP protocol. `(linux, windows, mac, gtk)`
  1. **GlobaLeaks** - ([Repo](https://github.com/globaleaks/GlobaLeaks), [Home](https://www.globaleaks.org/)) Web application to enable secure and anonymous whistleblowing initiatives. `(server)`
  1. **Hangups** - ([Repo](https://github.com/tdryer/hangups), [Snap](https://snapcraft.io/hangups), [Docs](https://hangups.readthedocs.io/en/latest)) Third-party instant messenger for [Google Hangouts](https://en.wikipedia.org/wiki/Google_Hangouts), with support for group messaging and other proprietary features. `(linux, mac, docker, snap)`
  1. **Hawkpost** - ([Repo](https://github.com/whitesmith/hawkpost), [Home](https://hawkpost.co/)) Web application which enables receiving encrypted messages from less technical senders. `(server)`
  1. **Helios Voting** - ([Repo](https://github.com/benadida/helios-server), [Home](http://heliosvoting.org/)) End-to-end verifiable voting system. `(server)`
  1. **Inboxen** - ([Repo](https://github.com/Inboxen/Inboxen), [Home](https://inboxen.org/), [Docs](https://inboxen.readthedocs.io/en/latest)) Web application which provides an infinite number of unique email inboxes, for segmenting services and maintaining privacy. `(server)`
  1. **Indico** - ([Repo](https://github.com/indico/indico), [Home](https://getindico.io/), [Demo](https://sandbox.getindico.io/), [Docs](https://docs.getindico.io/en/stable/installation)) Feature-rich web application designed at [CERN](https://en.wikipedia.org/wiki/CERN) for managing events, with support for conference organization workflow, from content management to receiving and reviewing abstracts/papers, event registration, payment integration, room booking, and more. `(organization, server)`
  1. **Magic Wormhole** - ([Repo](https://github.com/warner/magic-wormhole), [PyPI](https://pypi.org/project/magic-wormhole), [Docs](https://magic-wormhole.readthedocs.io/en/latest)) Security- and speed-focused file transfer tool with support for files, text, and directories. `(linux, mac, console)`
  1. **Mailman** - ([Repo](https://gitlab.com/mailman/mailman), [Home](http://www.list.org/), [WP](https://en.wikipedia.org/wiki/GNU_Mailman)) The original listserv, a web application and email server for managing subscriptions and discussion archives. `(server)`
  1. **Mailpile** - ([Repo](https://github.com/mailpile/Mailpile), [Home](https://mailpile.is/)) Fast email client with user-friendly encryption and privacy features. `(linux, windows, mac)`
  1. **Mailu** - ([Repo](https://github.com/Mailu/Mailu), [Home](https://mailu.io/)) Full-featured mail server designed for easy setup an