Comparator Fast allows you to change file attributes, detect missing files, detect new files and analyze duplicate files. It provides user defined presets and accepts command line parameters. It can detect unresolved files and can use schedule software to program synchronization processes. It can compare text files for differences, integrates with external software, keep most recent used (compared) folders and favorites folders (with quick access from system tray, open in Explorer or MS-DOS window). It supports drag-and-drop.