Alternativa Greasefireu za Microsoft Office Outlook sa licencom otvorenog koda

• Microsoft Office Outlook
  Sve platforme Windows Mac Linux Chrome OS Android iPhone Windows Phone Apple Watch iPad Android Tablet Kindle Fire Web Self-Hosted Software as a Service (SaaS) Firefox Opera Safari Vivaldi Browser SeaMonkey BSD PortableApps.com Microsoft Office Outlook Electron / Atom Shell Chrome Microsoft Edge Thunderbird Yandex.Browser Maxthon Sunbird Neovim
• Licenca otvorenog koda
  Bilo koja licenca Besplatna licenca Licenca otvorenog koda Komercijalna licenca