Given the Open nature of Valentina, one could create a pattern repo in github very easily.
I may even create one such repo, though my pattern making ability in NULL at the moment, I would really like to be able to browse patterns, and tweak existing layouts.
Send me patterns, and I'll upload them. Or I can add you to the contributors list, and you can send me your github name, I'll add you.
if a developed repo already exists, by all means, let me know.