Alternativa Clockwork SMSu za Windows S sa licencom otvorenog koda

• Windows S
  Sve platforme Windows Mac Linux Chrome OS Android iPhone Windows Phone iPad Android Tablet Windows S Web Self-Hosted Software as a Service (SaaS) PHP JavaScript Windows Mobile Java Apple TV C++ Objective-C C (programming language)
• Licenca otvorenog koda
  Bilo koja licenca Besplatna licenca Licenca otvorenog koda Komercijalna licenca