具有开源许可证的Windows S版DirectPoll的替代方案

• Windows S
  所有平台 Windows Mac Linux Chrome OS Android iPhone Windows Phone Blackberry 10 iPad Android Tablet Kindle Fire Windows S Web Self-Hosted Software as a Service (SaaS) Windows Mobile Chrome Microsoft Office Powerpoint
• 开源许可证
  任何牌照 免费许可证 开源许可证 商业牌照