具有免费许可证的S60版Pollscape的替代品

• S60
  所有平台 Windows Mac Linux Chrome OS Android iPhone Windows Phone Android Wear iPad Android Tablet Web Self-Hosted Software as a Service (SaaS) PHP Windows Mobile Java Mobile Wordpress Slack S60 Facebook Messenger Chrome Web Store MailChimp Trello Salesforce.com HubSpot Google Drive - Sheets Intercom Autopilot
• 免费许可证
  任何牌照 免费许可证 开源许可证 商业牌照