FolderSizes is described as «provides an engaging, interactive disk space analysis experience that you must try yourself to truly appreciate. More than just a series of diverse reports, FolderSizes allows you to visualize your disk space usage from multiple perspectives, like SequoiaView» and is an app in the system & hardware category. There are more than 50 alternatives to FolderSizes 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 FolderSizes are WizTree, TreeSize, Baobab Disk Usage Analyzer and DiskUsage.FolderSizes alternatives are mainly Disk Usage Analyzers but may also be System Cleaners or Duplicate File Finders. Filter by these if you want a narrower list of alternatives or looking for a specific functionality of FolderSizes.