A new wave of collaboration tools are taking hold in workplaces, particularly ones that value fast and frictionless communication and spontaneous collaboration.
The most popular of these is Slack. It works because it is focused, fast, and works well across devices.
The Universidad de Guadalajara Agora project organizers have used Slack to organize.
However, due to Provincial privacy legislation, using US-hosted services like Slack for coursework raises concerns. There are open source alternatives, one of which is Mattermost, hosted here.