Papaly is a simple social bookmarking tool to manage links.

Pearltrees is a visual and collaborative curation tool.

Bubblehunt is search platform, where you can create own search system.

Kifi creates a full-text index of every web page shared, making them easier to find in Slack, Google search.

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