Box - Box offers secure content management and collaboration for individuals, teams and businesses, enabling secure file sharing and access to your files online.

Roboflow Annotate - Annotate images with ease. Export to any format.

Nubo - A self-hosted file sharing application in Haskell.

Annotable - Ultimate image annotation & markup tool

4sync - A wonderful application that links all of your computers and mobile devices together. Easiest way to back up and sync your files online. Cross platform file management in the cloud

Annotate Screen - Browser based annotation tool.