Bynder - Bynder is a cloud-based digital asset management solution for marketing professionals looking to simplify how they manage digital content via one central portal.
CarrierWave - Solution for file uploads for Rails, Sinatra and other Ruby web frameworks.
CleanPix - CleanPix is a digital media management software solution.
Uppy - The next open source file uploader for web browsers
Wedia - Wedia is a cloud Marketing Resource Management (MRM) suite that enables organizations to create, customize, distribute and score content.
tus.io - File Uploads