Open Source Disk Space Analyzers

Qt-based directory statistics: KDirStat without any KDE -- from the author of the original KDirStat. QDirStat is a graphical application to shows where your disk space has gone and to help you to clean it up. This is a Qt-only port of the old Qt3/KDE3-based KDirStat, now based on the latest Qt 5. It does not need any KDE libs or infrastructure. It runs on every X11-based desktop on Linux, BSD and other Unix-like systems and of course in a Docker container.

Ncdu is a disk usage analyzer with an ncurses interface. It is designed to find space hogs on a remote server where you don’t have an entire graphical setup available, but it is a useful tool even on regular desktop systems. Ncdu aims to be fast, simple and easy to use, and should be able to run in any minimal POSIX-like environment with ncurses installed.

Treemap disk usage analyzer: In search of lost space (a.k.a. wata-analyzer)

https://github.com/subhra74/snowflake Snowflake is a graphical SSH client. It has a file browser, terminal emulator, resource/process manager, disk space analyzer, text editor, log viewer and lots of other helpful tools, which makes it easy to work with remote servers. It runs on Linux and Windows. Snowflake has been tested with Ubuntu server, CentOS, RHEL, OpenSUSE, FreeBSD, OpenBSD, NetBSD and HP-UX

Big File Finder, a simple program to find (all) files above a size at a target dir.

diskover is a file system crawler and disk space usage software that uses Elasticsearch to index your file metadata. diskover crawls and indexes your files on a local computer or remote storage server over network mounts. diskover helps manage your storage by identifying old and unused files and give better insights into data change "hotfiles", file duplication "dupes" and wasted space. It is designed to help deal with managing large amounts of data growth and provide detailed storage analytics. See GitHub for requirements and instructions on installing.