What’s the best replacement for the Windows 10 Snipping Tool?

Jane has read that Microsoft is removing the screen-capture utility in Windows 10 and would like a free alternative

The next Windows 10 update will remove the Snipping Tool, and I wonder if there is an alternative free tool you would recommend. Apparently the workaround is to use OneNote, but not for me. Jane

Taking screen grabs is now such an important part of personal computer use that Microsoft is certain to provide a good alternative. In fact, you will get to keep Snipping Tool alongside its replacement while Microsoft analyses the telemetry data that it uses to track mass (not individual) behaviour.