Wakelet

Wakelet is an all-in-one content curation and collaboration platform that allows users to bookmark, organize, and present various types of digital content into visual collections. It supports a wide range of media, offers collaboration features, and enables sharing through public links and embeds, catering to individuals, educators, and businesses.

Wakelet is a strong match for URList. It explicitly offers core features like saving and organizing content into collections (lists and sections), public sharing, and instant content capture via browser extensions and mobile apps. It supports various media types and allows embedding. While it doesn't explicitly mention 'Tufte-style side notes,' it does allow adding text and notes to items, which serves a similar contextual purpose. The interface is clean and focused on content curation, aligning with the minimalist aspect. It also has user profiles and granular sharing permissions.