Global (Free)

  1. actKM Forum (not online at the moment)
  2. APQC KM Community
  3. Cognitive Computing Consortium
  4. Corporate Knowledge Strategies
  5. Gurteen Knowledge Community - Gurteen Knowledge Management Community
  6. I2KI: International Institute for Knowledge & Innovation
  7. ICKM (International Council on Knowledge Management)
  8. International Federation of Library Associations and Institutions (IFLA) Knowledge Management Section
  9. INSNA (International Network for Social Network Analysis)
  10. Information Architecture Experts
  11. ISKO (International Society for Knowledge Organization)
  12. KM4Dev community of international development practitioners - Discussions
  13. KM Global Network - KMGN
  14. Local KM Community Leaders
  15. SIKM Leaders - Monthly calls the third Tuesday of every month from 11:00 AM to 12:00 PM ET
  16. Special Libraries Association (SLA) Knowledge Management Division
  17. Taxonomy Community of Practice

Global (Fee-based)

  1. APQC
  2. Community Roundtable
  3. Consortium for Service Innovation
  4. CIKM (Council on Information and Knowledge Management)
  5. Digital Workplace Council
  6. Knowledge & Collaboration Council
  7. Knowledge & Information Professional Association (KIPA)
  8. Knowledge Leaders Council
  9. SocialMedia.org
  10. Social Media Club
  11. Social Media Council

Community Management

  1. Admin Zone: Managing an Online Community
  2. Australian Community Managers
  3. CMX Hub
  4. Community BackChannel
  5. Community Manager, Advocate, and Evangelist
  6. Community Roundtable
  7. e-mint: Association of Online Community Professionals
  8. Feverbee
  9. My Community Manager and Google+
  10. Online Facilitation

By Platform

  1. Facebook Groups
  2. Google+ Communities
  3. LinkedIn Groups
  4. Yahoo! Groups

Microsoft Technology

  1. Delve
  2. Microsoft Teams
  3. Office 365
  4. Office 365 Analytics
  5. Office 365 Groups
  6. SharePoint
  7. Skype for Business
  8. Yammer

Local

  1. Local KM Community Leaders
  2. Australia
  3. Austria Wissensmanagement Forum
  4. Belgium: SuperCoP KM Belgium
  5. Canada: CIKM (Council on Information and Knowledge Management)
  6. Colombia: KM Medellín
  7. France:  Club Gestion des Connaissances
  8. Germany: GfWM: Gesellschaft für Wissensmanagement (Society for Knowledge Management)
  9. Hong Kong
  10. India
  11. Indonesia: Knowledge Management Society Indonesia (KMSI)
  12. Japan: KM Society of Japan
  13. Russia: KM Russia
  14. Singapore: Information & Knowledge Management Society (iKMS)
  15. South Africa: Knowledge Management South Africa
  16. Switzerland: Swiss Knowledge Management Forum (SKMF)
  17. Thailand
  18. UK
  19. US
  20. Vietnam: Vietnam Knowledge Management Club