Here are a few links to information mentioned in the July Post Processing SIG. The topic was Lightroom Plug-ins.
Two links from Scott Kelby’s website, Lightroom Killer Tips, on “Plug-in Workflows with Lightroom Classic”:
https://lightroomkillertips.com/plug-in-workflows-with-lightroom-classic/
https://lightroomkillertips.com/plug-in-workflows-with-lightroom-classic-part-2/
Jeffrey Friedl’s Blog – a source for many Lightroom plug-ins:
http://regex.info/blog/lightroom-goodies
Luminar AI http://www.skylum.com
Topaz https://topazlabs.com/shop/
NIK Plugins (Viveza, Color Efex, Silver Efex, etc. https://nikcollection.dxo.com/
Lightroom Duplicate Finder plug-in https://www.lightroom-plugins.com/DupesIndex.php
Any Filter plug-in and more https://johnrellis.com/lightroom/allplugins.htm
Alan Hunt