XMarks is a cloud based bookmark management platform.

GC Bookmarks is a cloud based bookmark manager.

ReadKit is a full-featured read later and RSS client that supports services from Instapaper, Pocket, Pinboard, Feedly, Fever, NewsBlur, Feedbin, etc.

Shaarli is a personal, minimalist, super-fast, database free, bookmarking service.

Hitabs is a web platform to save, group and share your links, bookmarks and useful online resources.