The best alternatives to FrontSketch are Zight , Josh Parnham, and ScreenTray. If these 3 options don't work for you, we've listed a few more alternatives below.
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Haggle — A CTA buyers want to click, when they aren't ready to demo
A macOS app for capturing, annotating and sharing screenshots. Quickly add comments, highlight what matters or blur any sensitive content. Upload screenshots to Google Drive or Dropbox. Copy screenshots to the ...
Browser based annotation tool. Free and easy to markup images. Upload any images or take screenshot of your screen. Without any accounts. Just annotate!