Alternativa Clockwork SMSu za Windows S z licenco odprtokodnega vira

• Windows S
  Vse 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)
• Open Source licenca
  Vsako dovoljenje Brezplačna licenca Open Source licenca Trgovsko dovoljenje