Spyglass AlternativesDisk Usage Analyzers and other similar apps like Spyglass

Comprehensive disk analysis tool offering treemap visualizations to identify large files, duplicate detection, and versatile cleanup actions. Operates offline, ad-free, and open-source, it runs portably on Windows without registration, providing a lightweight solution to manage disk storage.

Powerful GNOME application that provides in-depth disk usage analysis with graphical representation. It supports scanning of volumes, specific directories, and network folders, offering insights into space allocation both locally and remotely.

With DaisyDisk you can free up disk space by quickly finding and deleting big, useless files. The program scans any mounted disk and displays it on the sunburst map, where segments mean files and folders, proportionally to their sizes. The map is easy to read and navigate.

Monitor your mounted drives and storage volumes, with free/used space at a glance.

Inspect your disk and find the files that occupy the most space or that haven’t been modified in a long time.

Space Radar is a disk and memory space visualization app built with Electron and D3.js. It currently supports Sunburst, Treemap, and Flamegraph charts and is available for Mac and Windows.

A disk usage free utility for Linux.

Free open-source cross-platform file & directory statistics as found on Github

i.Disk scans directory trees and displays the total space used by each directory in an easy to use form.

DiskSavvy is a free, fast and easy-to-use disk space analyzer utility allowing one to analyze disk usage in one or more disks, directories, network shares and/or NAS storage devices.

Disk analyzer pro is the best disk space management software and storage analyzer which helps in managing and handling hard disk space and running your PC with the highest speed.

DiskView shows you a graphical map of your disk, allowing you to determine where a file is located or, by clicking on a cluster, seeing which file occupies it.