JDiskReport enables you to understand how much space the files and directories consume on your disk drives, and it helps you find obsolete files and folders. Developed by JGoodies
License: Free
RidNacs offers a more detailed analysis with real-time monitoring and multiple visualizations, making it suitable for users who require in-depth disk usage insights. JDiskReport, while simpler and intuitive, focuses on providing essential disk space analysis without the advanced features found in RidNacs.