Syncany - Syncany is an open-source cloud storage and filesharing application.
React Native - A framework for building native apps with React
Filestash - Filestash is a modern client for FTP, SFTP, S3, WebDAV, Minio,...
Render UIKit - React-inspired Swift library for writing UIKit UIs
Dropbox - Online Sync and File Sharing
Ionic - Ionic is a cross-platform mobile development stack for building performant apps on all platforms with open web technologies.