Finsweet Products is a suite of Webflow extensions: Attributes (open-source, add filtering/sorting/search/CMS sliders via HTML attributes, no code), Client-First (a CSS class-naming and structure system), and Components (a library of ready-to-use sliders, carousels, marquees).
Attributes is free and open-source. Client-First is a free methodology/guide. Components pricing varies by product; some Finsweet tools (e.g. ConsentPro) start around $19.
Webflow designers and developers who need advanced site functionality (filtering, CMS interactivity) without custom code, and agencies who want a consistent, documented class-naming system across client projects.
Start with Client-First as a naming/structure convention even before reaching for Attributes: it keeps a Webflow project readable for whoever inherits it later, which matters more on agency and multi-person projects.
Framework enabling advanced functionality within Webflow.