• Skype for Business (#Skype4B)
• Microsoft Teams (#MSTeams) - http://teams.microsoft.com
• Skype
• Google Hangout
• https://appear.in
• Jitsi - https://meet.jit.si (Desktop-Sharing with Chrome AddIn: https://chrome.google.com/webstore/detail/jitsi-meetings/kglhbbefdnlheedjiejgomgmfplipfeb)
• Zoom.us
• …

• Yammer (see Working Out Loud Communities)
• Microsoft Teams (#MSTeams) - http://teams.microsoft.com
  • Microsoft OneNote - best integrated in Teams
• IBM Connections
• Workplace for Facebook (ask Simon Fogg: http://srjf.blogspot.com/2017/11/invitation-to-be-part-of-wol-circle.html)
• Connectle - https://connectle.mn.co (ask Mara Tolja)
• Google docs - LINK
• APPLE Zusammenarbeit - LINK

• Microsoft ToDo (for yourself)
• Microsoft Planner (open for your team - best integrated in MS Teams)
• Microsoft OneNote
• Atlassian Trello - LINK
• Padlet - https://de.padlet.com/
• Google Docs
• …

• Web Conferencing like Skype for Business, Skype, Zoom, GoToMeeting, Circuit
• Instant Messengers like Threema, MS Teams, Slack, WhatsApp, WeChat, Telegram, Signal, RocketChat
• Enterprise Social Networks like Jive, Yammer, Connections, Lithium, Workplace by Facebook
• Personal Notebooks like OneNote, Evernote, TiddlyWiki, Etherpad
• File Hosting Services like Dropbox, OneDrive, Google Drive, OwnCloud
• Task Management Services like Trello, Microsoft ToDo, Microsoft Planner
• Mind Mapping Software like XMind, Freemind, MindManager, iThoughts, MindMeister
• Weblog Software like Wordpress, Tumblr

(source: https://github.com/simondueckert/lernos/blob/master/lernOS%20mi%20Guide%20-%20en/lernOS-mi-Guide-en.pdf / https://github.com/simondueckert/lernos/blob/master/lernOS%20mi%20Guide%20-%20en/lernOS-mi-Guide-en.md by Simon Dückert)

also see material