Alternativas ao Workupload para Microsoft Office Outlook com licença de código aberto

• Microsoft Office Outlook
  Todas as plataformas Windows Mac Linux Chrome OS Android iPhone Windows Phone Blackberry iPad Android Tablet Kindle Fire Web Self-Hosted Software as a Service (SaaS) Firefox Opera Microsoft Office Outlook Chrome Tor Browser Bundle
• Licença Open Source
  Qualquer licença Licença gratuita Licença Open Source Licença comercial