Cyberduck - A libre FTP, SFTP, WebDAV, S3, Backblaze B2, Azure & OpenStack Swift browser.
PowerSchool - PowerSchool provides a K-12 education technology platform for operations, classroom, student growth, and family engagement.
ProjectSend - ProjectSend is a self-hosted application that lets users upload files and assign them to specific clients.
Clever - syncing between education applications for K-12 schools
FileZilla - FileZilla is an FTP, or file transfer protocol, client. It lets individuals transfer single files or batches to a web server. For many years, FTP was the standard for website design. Read more about FileZilla.
Claroline - Claroline is a collaborative eLearning and eWorking platform.