RagSnip

RagSnip captures a region of the screen using the built-in Windows Snip & Sketch overlay, uploads it to your choice of catbox.moe, 0x0.st, or Imgur, and puts the resulting URL on your clipboard. The persistent GUI keeps a thumbnail history of recent snips — left-click any row to re-copy the URL, right-click for a menu (Copy URL / Copy image / Open in browser).