Alternativen zu CloudEmail.io für F-Droid mit Open Source-Lizenz

• F-Droid
  Alle Plattformen Windows Mac Linux Chrome OS Android iPhone Blackberry Blackberry 10 Apple Watch Android Wear iPad Android Tablet Kindle Fire Windows S Web Self-Hosted Software as a Service (SaaS) Windows Mobile Java Mobile F-Droid S60 Android TV Chrome MetaMask OpenPGP PureOS (Purism) S/MIME DAVdroid
• Open Source Lizenz
  Beliebige Lizen Freie Lizenz Open Source Lizenz Kommerzielle Lizenz