具有开源许可证的Termux版footnote的替代方案

• Termux
  所有平台 Windows Mac Linux Chrome OS Android iPhone Windows Phone Apple Watch Android Wear iPad Android Tablet Kindle Fire Windows S Web Self-Hosted Software as a Service (SaaS) Firefox Opera Safari Internet Explorer BSD Windows Mobile Xfce PortableApps.com Chrome Firefox OS Termux
• 开源许可证
  任何牌照 免费许可证 开源许可证 商业牌照