High Quality Content by WIKIPEDIA articles! BookmarkSync is an automatic synchronization service that allows users to access their bookmarks or favorites from any computer or any web browser. The BookmarkSync client runs as a small program within the computer`s system tray and monitors the bookmarks in the user`s browser, automatically uploading any changes to a central server. This allows one to keep browsers across separate computers synchronized. Cross-platform synchronization is possible by using the Mac OS X client.