ownCloud web server core (Files, DAV, etc.)
Sync little subsets of your Postgres data into local apps and services
ownCloud Infinite Scale Stack
Folder comparison and synchronization software
File Synchronisation for Cozy on Desktop and Laptop
Rclone desktop app
A generic JSON document store with sharing and synchronisation options
A GUI tool (Mac, Windows, Linux) for doing stuff
Desktop Syncing Client for ownCloud
RClone Manager is a cross-platform GUI application
Sync Floccus' browser bookmarks to a local folder / any cloud
Utility that automatically syncs the clipboard across devices
Database Replication, Filtered Synchronization, and Transformation
Keep multiple browsers & devices in sync when building websites
Sync Outlook with Google, SOGo or any other CalDAV / CardDAV server
Sync Outlook contacts and calendars with Google
Share and collaborate by syncing with any Git repository
Synchronize your playback over the Internet
All-in-One Sync, Backup & Deduplication Tool
simple file sharing
Sync manager that helps you sync your files across different locations
Utility for synchronizing distribution mirrors
Syncdrome: Fast, smart file catalog & search for your drives
honSFV is a free tool for creating and verifying SFV files easily.