In e-commerce space you might take a look at: https://theheadlessclub.com/. It's exactly what you're looking for. Quote from about page:
"Most directories tend to put emphasis on shiny and showy hyper-animated web experiments. Unfortunately, many of these projects fail when criteria like performance, mobile, usability, and accessibility are considered. It’s hard to find one single resource on the internet that would combine both the technological excellence and highly polished design in ecommerce space. The Headless Club started as an internal agency tool to foster ecommerce best-practices across our development team. Now we’re sharing our findings with you."
Disclaimer: I'm the co-author (with folks from commerce-ui.com agency). We'll soon make it not specific to headless but to all e-commerce stores.
"Most directories tend to put emphasis on shiny and showy hyper-animated web experiments. Unfortunately, many of these projects fail when criteria like performance, mobile, usability, and accessibility are considered. It’s hard to find one single resource on the internet that would combine both the technological excellence and highly polished design in ecommerce space. The Headless Club started as an internal agency tool to foster ecommerce best-practices across our development team. Now we’re sharing our findings with you."
Disclaimer: I'm the co-author (with folks from commerce-ui.com agency). We'll soon make it not specific to headless but to all e-commerce stores.