TreeSize is described as «Professional tells you where precious disk space has gone to. It can be started from the context menu of a local folder or a local drive and displays the size of each folder, including its subfolders» and is a very popular disk usage analyzer in the system & hardware category. There are more than 50 alternatives to TreeSize for a variety of platforms, including Windows, Linux, Mac, BSD and KDE. The best alternative is WinDirStat, which is both free and Open Source. Other great apps like TreeSize are WizTree, Baobab Disk Usage Analyzer, ncdu and FreeCommander.TreeSize alternatives are mainly Disk Usage Analyzers but may also be File Managers or System Cleaners. Filter by these if you want a narrower list of alternatives or looking for a specific functionality of TreeSize.
