Alternativas ao BirdieSync para Software as a Service (SaaS) com licença de código aberto

• Software as a Service (SaaS)
  Todas as plataformas Windows Mac Linux Android iPhone Blackberry iPad Android Tablet Web Self-Hosted Software as a Service (SaaS) BSD Windows Mobile F-Droid S60 HP webOS
• Licença Open Source
  Qualquer licença Licença gratuita Licença Open Source Licença comercial