[laurentl]

BeyondCompare (cited in the original thread), especially the folder comparison feature. Saved my sanity when our team's shared directory stopped syncing silently on my laptop and I had to figure out which files I needed to sync manually.

WizTree (https://antibody-software.com/web/software/software/wiztree-...) is a freeware Windows utility (man, typing this took me back to 1997) that lets you quickly see which files are hogging your disk space. Think "df GUI for Windows". Especially useful to track down large application files hidden in the depths of system folders.

[j1elo]

Meld [0] (written with GTK so available on Windows, Linux, and possibly Mac but I don't know about that last one) is another tool in the first category.

WinDirStat [1] (Windows) for the second. It is also available in the super-useful PortableApps format [2], which is always nice.

[0]: https://meldmerge.org/

[1]: https://windirstat.net/

[2]: https://portableapps.com/apps

[Semaphor]

WinDirStat is extremely slow compared to WizTree, give WizTree a try :)

[fragmede]

`ncdu` is my preferred Linux ncurses equivalent to windirstat

[scott-smith_us]

BeyondCompare is an absolute workhorse for me. It's kind of amazing how many unrelated tasks involve directory and file comparison.

[kabdib]

AraxisMerge (pretty -- ahem -- comparable to BeyondCompare). A good visual diff tool is a must-have; I can't imagine life without one.

[wallstprog]

+inf to BC: http://www.scootersoftware.com/

[soheilpro]

Second that. Cannot imagine living without Beyond Compare.