TreeSize Free is a free disk space manager for Windows. The software shows you the sizes of folders including all subfolders. Developed by JAM Software (Joachim Marder)
License: Freemium
GrandPerspective is a lightweight, free tool primarily for Mac users that offers a simple way to visualize disk usage with treemaps, making it suitable for casual users. In contrast, TreeSize is a more comprehensive and feature-rich application available on multiple platforms, ideal for professional and enterprise users who require detailed reporting and advanced file management capabilities.