Alternativer til InstAddr til OpenPGP med open source-licens

• OpenPGP
  Alle platforme 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) Firefox Opera Safari Windows Mobile Java Mobile S60 Android TV Chrome MetaMask Yandex.Browser OpenPGP
• Open Source-licens
  Enhver licens Gratis licens Open Source-licens Kommerciel licens