JDiskReport

This app provided me a really simple way to get a comprehensive overview of disk usage. There is an overall overview of disk usage by file type (it is excellent at classifying individual file types; it even recognized my VirtualBox VMs. However it didn't understand git repositories .git tree as one type of file). There is also an overview of usage by directory; both of these combined help you effectively drill down into and safely delete the useless cruft that builds up over time using a computer. I also really like that this is a Java app that will run on any platform, so I can get the same user experience across Windows, Linux, and Mac OS X (previously, I had used WinDirStat, Disk Usage Analyzer, and Disk Inventory X on each platform, respectively). On Mac OS X, I like that it instantly detects when you've deleted a file on the file system so it can update its display. I don't like that you cannot delete files directly from the the app, but this is a minor inconvenience.

Overall, an excellent piece of software that should get more attention!

I can:
browse directory tree to see its contents.
display distribution of filetypes, modification times, mean sizes.
see files in directories
See largest files list
Unable to click to open or delete file.

https://wiki.gnome.org/action/show/Apps/DiskUsageAnalyzer (Baobab) - default app on my Linux allows nearly the same thing, only its presentation of the used space does not mention directory names, i have to hover over the disk part using mouse, then it shows. Also DiskUsageAnalyzer does have tab to list largest files, i can only see largest directories and go to directory and sort the file list by size, jdiskreport has separate tab to list overall largest files for whole drive. DiskUsageAnalyzer though is better in opening folder and file and moving file to trash. I have not seen jDiskReport allows this on Linux. I guess i will stay with DiskUsageAnalyzer.

[Edited by ZeroNet_io, November 14]

Like it because it looks the most like Windirstat and DiskInventoryX. All the other ones show size charts which I don't care about. Want to see folder structure sorted by size. Could be better from a visibility perspective.

Not very fat, but works well.
Statistics on long time is a must, binary format of the scan files, unlucky.

The Best lightweight software to manage disk space

Beautiful app in it's presentation/visualisation of space distribution.

Bewildering though that you can't launch a directory in Finder/Explorer, or do any dir/file operations.

A nice powerful tool with a great interface.