I've been using several beta versions of OmniDazzle for a few weeks, but now that version 1.0 is for sale (today? yesterday?), I just bought a license.

Although OmniDazzle doesn't do much, it's one of the most useful apps I've seen in a long time. Using the Cutout plug-in (along with Apple's system-wide Command-Shift-4), I'm able to take way more meaningful screenshots than ever before.