Wix
https://www.wix.com/website/templates
Free Website Templates
https://freewebsitetemplates.com/
Freebiesbug
https://freebiesbug.com/psd-freebies/website-template/
Freepik
https://www.freepik.com/free-psd/web-templates
OS Templates
https://www.os-templates.com/free-psd-templates
http://ibrandstudio.com/category/freebies