Open Source C# Disk Space Analyzers

SpaceSharp is a free, open-source disk space analyzer for Windows 10 and 11, inspired by SpaceMonger. It scans a drive or a folder and draws it as a zoomable treemap: every folder is a frame, every file a box sized by the space it uses, so the big things stand out at a glance. NTFS drives are read straight from the file table, so a million files take seconds. Insights shows space by type, places that are safe to clear, game libraries, developer leftovers and old downloads. A duplicate finder compares file contents, and an empty folder list skips anything a program needs. Every scan is saved and compared with the last, so you see what grew. A plain-words filter, 24 palettes, dark and light themes and 18 languages round it out. Everything goes to the Recycle Bin, except folders too deep for Explorer, which it can remove for good. Portable and installable builds for 64-bit and 32-bit Windows, code-signed. MIT License, actively developed on GitHub.

Are you tired of being unable to find what is using up precious hard disk space? Find that huge folder that you didn't know it was there. Select drive and press start to go through directories manually. Click the refresh button to calculate folder size, double-click to the folder name, or press "+" button to see sub folders. Deleting a folder is possible by clicking the bin button next to the folder. Increase the maximum number of folders when required. (Using more than 10 is recommended for large folders such as Program Files).

Sadeaner is a powerful and efficient tool for cleaning your PC. It offers a wide range of useful functions, such as the ability to remove unnecessary files and folders, free up valuable disk space, and improve the overall performance of your system. This makes it an excellent choice for gamers, as it can help to free up resources and improve the performance of games. Additionally, Sadeaner will also include advanced features such as a registry cleaner, startup manager, and browser cleaner, which can help to keep your system running smoothly and efficiently.

c² flux is an ultra-fast Windows disk space analyzer. Its high-speed scanning engine reads NTFS metadata directly from the Master File Table (MFT) and uses native Windows NT directory APIs as a fallback, avoiding slower file-by-file access whenever possible. Results are shown in sortable tree, table, pie and bar chart views and can be saved, loaded, exported or copied to the clipboard.

DiskGeek scans your drives and shows exactly what's eating your space, with a sortable list view and a treemap view. It finds exact duplicates (SHA-256) and near-duplicate / visually similar images using perceptual hashing, with full-text search across scan results and batch rename. Snapshot comparison shows what changed between scans over time, and scheduled, unattended scans can run from the command line for ongoing monitoring. Includes NTFS permission auditing plus CSV/HTML export. No installer bloat, no bundled offers, no telemetry, no Pro tier or upsells — 100% free. Requires Windows 10 or 11 (64-bit). Self-contained installer bundles .NET 8, ~32 MB download.

Little Disk Cleaner is a open source program written in C# that removes any unneeded files to free up extra hard drive space and make windows run faster.

The application checks each drive for free space and compares them with the threshold values designated by the user. If they are below threshold, it sends out mail to the designated addresses. Application includes two projects; a configuration form and a windows service. Service triggers every hour and sends mail if the conditions are met.

Current official release: 1.1.2. Windows 10 2004+ or Windows 11 (x64). Osenpa Disk Analyzer is a free, closed-source Windows app for investigating storage use. Scan one drive or connected drives, inspect file and folder sizes, and filter by category or name. Supported NTFS volumes can use MFT scanning with folder-traversal fallback. Review access warnings and inspect item locations before removing anything. Size and age alone do not mean a file is safe to delete. Name results display up to 2,000 matches. Scanning stays local; launch checks use the network, and optional online search can share a selected path. Current downloads are available from the Official Download link: https://osenpa.com/osenpa-disk-analyzer. Earlier EXE files have been removed from this SourceForge page. License terms accompanying previously distributed copies are unchanged.

GUI is little broken - the list of duplicates is not relayeble, but this bug not affected main functionality.

List the sizes of files and folders on your computer.

On the surface, Double File may look like WinDirStat (from which it borrows code) or similar graphical drive utilization utilities: e.g. the second assembly 'Volume Treemap'. However, Double File is project-based: it saves file checksums in directory listings you store locally. It facilitates planning and transitioning between computers and operating systems: snapshot your drive and safely archive it. Listings can be searched when volumes are off site. Can read any volume mounted in Windows Explorer, including Linux and Mac volumes. Supports long path names.