The FileCloud server is self-hosted and gives me the ability to store and share files, sync across different devices and back-up all documents and photos so that I don't have to worry about security.
odrive - odrive aggregates all cloud storage. Access, sync, share, and encrypt everything in one place. Integrations to 20+ storage services, desktop sync, Linux support, placeholder files, zero-knowledge-encryption, web client, advanced sharing, and more!
ifttt - IFTTT puts the internet to work for you. Create simple connections between the products you use every day.
ExpanDrive - ExpanDrive is a fast network drive and browser for cloud storage.
Duplicati - Free backup software to store backups online with strong encryption. Works with FTP, SSH, WebDAV, OneDrive, Amazon S3, Google Drive and many others.
WebDrive - WebDrive File Access Client allows you to open and edit server-based files without the additional step of downloading the file.
Cyberduck - A libre FTP, SFTP, WebDAV, S3, Backblaze B2, Azure & OpenStack Swift browser.