Hygger - Hygger - is an Agile project management tool with built-in prioritization.
Google Groups - Google Groups allows you to create and participate in online forums and email-based groups with a rich experience for community conversations.
Wrike - Wrike is a flexible, scalable, and easy-to-use collaborative work management software that helps high-performance teams organize and accomplish their work. Try it now.
Groups.io - Email and web based discussion group software, includes archiving, emails, wiki, polls, file...
Asana - Asana project management is an effort to re-imagine how we work together, through modern productivity software. Fast and versatile, Asana helps individuals and groups get more done.
Gaggle Mail - Gaggle Mail is a simple and easy to use email list manager.