Hi, Today I find 3 sites with tools that might help you.
1) Nookazon
Nookazon is a site for acnh trades.
Link: https://nookazon.com/
2) Nooknet
Nooknet is a site for acnh tools, it has a tune maker and a gallery of clothes designs
Link: https://nooknet.net/
3) Acislove
Acislove is a site to easily design patterns, Its really good site and my favorite out of these 3.
Link: https://acislove.com/
I hope I helped you!