cdTree is an easy to use, efficient and powerful media cataloging tool. It will let you catalog and categorize CDs, CDRs, CDRWs, Hard Disk Directories, Floppies, Zip Drives, DVDs and Audio CDs for offline browsing. It also catalogs zip files contents and present it in an intuitive way. The tool is able to uniquely recognize if a CD has been scanned before and thus avoid duplication in the data.