Alternativer til Mailsmith til PortableApps.com med kommerciel licens

• PortableApps.com
  Alle platforme Windows Mac Linux Chrome OS Android iPhone Apple Watch iPad Android Tablet Windows S Web Self-Hosted BSD Xfce Haiku PortableApps.com Slack F-Droid Ruby Gmail GNOME Cloudron Amazon Echo (Alexa Voice Service) PureOS (Purism)
• Kommerciel licens
  Enhver licens Gratis licens Open Source-licens Kommerciel licens