具有开源许可证的Sketch版OmniGraffle的替代方案

• Sketch
  所有平台 Windows Mac Linux Chrome OS Android iPhone Windows Phone iPad Android Tablet Kindle Fire Windows S Web Self-Hosted Software as a Service (SaaS) Firefox BSD PortableApps.com Slack Electron / Atom Shell Chrome Sketch Microsoft Office Word Google Drive Google Drive - Docs Google Apps Trello Microsoft Office Suite Google Drive - Sheets Atlassian Stash Google App Engine
• 开源许可证
  任何牌照 免费许可证 开源许可证 商业牌照