unclear how clon-ish they are, and
is it wise to provide links to them ?
Very clonish. They are rebrands with a non-default theme specified. Pretty obvious from the screenshots.
It is very wise to provide links to them so the specific violations can be rectified with takedown requests from the official organization. This protects users from malicious actors and protects Libreoffice’s brand identity. These clones, if they make any modifications at all, it is to cripple the software by inserting annoying nagware screens to compel users to purchase the app for basic features like printing, or saving a file. This kind of behavior must be heavily punished.
Is that all you checked?
.
You state the apps “violate licence”? Do they?
The licencing for LibreOffice is rather permissive, so just from screenshots I can’t judge.
.
Imho: Only, if they’d claim to come from TDF/LibreOffice there would be a problem - but I’m no lawyer.
.
No need to like this, but that is the price for freedom.
And there are rasons, why “lesser” gpl or MPL are used.