FolderSize is a Free Folder Size Calculating Tool created by Jan Horn. It can check the size of all folders on a select drive, making it easy to Find the largest files or folders and figure out which are consuming the most space. Options include; ability to select a drive or folder hierarchy to scan, set size to appear to left or right, set size parameters to use for colored folder icons.
TreeSize is a Free tool that can be used to get folder size or list directories by size in Windows. This organized directory tree tool can be used to easily figure out which folders and sub-folders are using the most space. Find out what is taking up disk space (space hogging), helping you reduce clutter on a drive.
List Large Files is a Free Portable USB Application that can be used to find the Largest Files in Windows. The tool works by using a GetFiles method to recursively search directories on a drive. It then compiles a string list of these files and sorts the resulting list by size.