ncdu, TreeSize, WinDirStat, DaisyDisk, WizTree, SpaceSniffer, GrandPerspective, KDirStat, SpaceMonger, WhatSize, OmniDiskSweeper, Disk Inventory X, Folder Size Explorer, SequoiaView, DiskUsage, crossdirstat, Diskitude, Grid Size File Manager, DiskSavvy, Disko, JDiskReport, Filelight, Xinorbis, HDGraph, QDirStat, FSV, FolderSizes, Disk Space Fan, Overdisk, xdiskusage, DiskWave, Space Radar, Disk Xray, Directory Size Calculator, FilePro, TreePie, SquirrelDisk, K4DirStat, RidNacs, i.Disk, TDP x-Ray, 1Tree Pro, DirGraph, SpaceObServer, GetFolderSize, Disk Space Visualizer, DiskMapper, PA Storage Monitor, Disk Space Fan Pro, Precious Disk, ClearDisk, Philesight, diskring, xdu, Disk Space Pro, DiskTriage, StepTree, GD Map, Disk Space Finder, UtilStudio Disk Space Finder, Diskvision are some alternatives to Baobab Disk Usage Analyzer.