具有免费许可证的Android Wear版Peace Mail的替代品

• Android Wear
  所有平台 Windows Mac Linux Chrome OS Android iPhone Android Wear iPad Android Tablet Kindle Fire Windows S Web Self-Hosted Software as a Service (SaaS) PHP Windows Mobile Java Mobile S60 Android TV Chrome Cloudron OpenPGP
• 免费许可证
  任何牌照 免费许可证 开源许可证 商业牌照