The Debian community has a preference for using tools that are based on 100% free software.

Many popular web sites like Github and Hangouts do not release their own source code so we use alternatives.

Here are some suggested tools:

Purpose

Well known proprietary tools

Alternative

Useful documentation, getting started

Version Control (VCS)

Github

https://salsa.debian.org

Video calling

Google Hangouts, Skype

Jitsi Meet, rtc.debian.org

discussed on list

Project management

Asana, Trello

Redmine with Kanban plugin, Kanboard, on storm.debian.net we have Wekan and Scrumblr

discussed on list

Talking

?TeamSpeak, Ventrilo, Hangouts, ?FaceTime, Skype, ?WhatsApp

Mumble

Contact Thomas Levine to use his server.