The Miscellaneous tools do a number of useful things without fitting neatly into a category. The Paths tool takes Selections up a notch and also lets you add interesting effects. Zoom is one you would use every day, and Measure is handy in some situations. Finally, GEGL Operations are the future of all GIMP development

Links:

https://docs.gimp.org/2.8/en/

https://en.wikipedia.org/wiki/B%C3%A9zier_curve

https://en.wikipedia.org/wiki/Font_hinting

https://www.webopedia.com/TERM/A/antialiasing.html

https://docs.gimp.org/2.8/en/gimp-tool-gegl.html

https://docs.gimp.org/2.10/en/gimp-tool-gegl.html

https://www.youtube.com/watch?v=aEsqVMCgpJ8

https://www.patreon.com/m/649544/posts

https://www.ahuka.com/gimp/miscellaneous-tools/