Alternativa wireframe.ccu za Slack sa besplatnom licencom

• Slack
  Sve platforme Windows Mac Linux Android iPhone iPad Android Tablet Web Self-Hosted Software as a Service (SaaS) Firefox PortableApps.com Slack Electron / Atom Shell Trello Microsoft Office Suite Atlassian Stash Google App Engine
• Besplatna licenca
  Bilo koja licenca Besplatna licenca Licenca otvorenog koda Komercijalna licenca