Alternativa KeyGeniusu za Thunderbird z brezplačno licenco

• Thunderbird
  Vse platforme Windows Mac Linux Chrome OS Android iPhone Windows Phone Blackberry Apple Watch iPad Android Tablet Kindle Fire Windows S Web Self-Hosted Software as a Service (SaaS) Firefox Opera Safari Internet Explorer Chromium Vivaldi Browser SeaMonkey PHP Python BSD Windows Mobile Java Mobile Xfce PortableApps.com S60 Chrome Docker Tor Browser Bundle Microsoft Edge HP webOS Thunderbird Git Yandex.Browser Chrome Web Store Maxthon Sunbird Brave Microsoft SQL Server Mono GnuPG Microsoft Silverlight LastPass SaferPass
• Brezplačna licenca
  Vsako dovoljenje Brezplačna licenca Open Source licenca Trgovsko dovoljenje