Alternativas ao Skloog para iPad com licença comercial

• iPad
  Todas as plataformas Windows Mac Linux Chrome OS Android iPhone Windows Phone Blackberry iPad Android Tablet Web Self-Hosted Software as a Service (SaaS) Firefox Opera Safari Internet Explorer Vivaldi Browser BSD Waterfox Pale Moon Chrome Yandex.Browser Firefox OS Cloudron
• Licença comercial
  Qualquer licença Licença gratuita Licença Open Source Licença comercial