I usually stop short of knocking on doors asking if people want to hear the word of Skitch. Seriously, everyone loves my issues and pull requests filled with screenshots and arrows.
Or at least I was, until I upgraded to High Sierra, just to see all sorts of low-level utilities go with flying marks, but Skitch showing both bugs (continuous crashes and messing up the screenshots). I'd purchase it (but not Evernote, not interested in it), but given they apparently bought Skitch just to suck its features and close, I'm evaluating TechSmith SnagIt. ?♂️