Alternativer til ResellerRatings til Thunderbird med open source-licens

• Thunderbird
  Alle platforme Windows Mac Linux Chrome OS Android iPhone Windows Phone iPad Android Tablet Web Software as a Service (SaaS) Firefox Opera Safari Internet Explorer Windows Mobile Wordpress Shopify Chrome Thunderbird Yandex.Browser
• Open Source-licens
  Enhver licens Gratis licens Open Source-licens Kommerciel licens