Alternativer til Stride til PureOS (Purism) med open source-licens

• PureOS (Purism)
  Alle platforme Windows Mac Linux Chrome OS Android iPhone Windows Phone Blackberry Blackberry 10 Apple Watch Android Wear iPad Android Tablet Windows S Web Self-Hosted Software as a Service (SaaS) Firefox Safari Xbox JavaScript Python BSD PortableApps.com Facebook Slack Electron / Atom Shell F-Droid Ubuntu Facebook Messenger Chrome Discord Node.JS Microsoft Office 365 Linux Mint Telegram Firefox OS Redmine Cloudron ZeroNet Go (Programming Language) Ruby on Rails Google Play Store Microsoft SharePoint PureOS (Purism) HipChat Kubuntu Yammer WeeChat total.js tibbr Jive Socialcast chatter.com
• Open Source-licens
  Enhver licens Gratis licens Open Source-licens Kommerciel licens