Disk Space Analyzer includes the ability to copy or move selected files as opposed to just deleting them, which could be pretty handy (noting that that comparison chart is on the Nektony site so use your own judgement there). Version 1.3 of Disk Inventory X added support for macOS 10.15 Catalina, while the earlier version 1.2 added support for macOS 10.14 Mojave and its dark mode feature. Inspired by WinDirStat, it shows the sizes of files and folders in a graphical treemap. Daisy Disk seems to have a higher profile, and includes the ability to scan your cloud storage for Dropbox, Google Drive and OneDrive. Disk Inventory X is a disk space analyzer utility for Mac OS X 10.3 and later. They look pretty similar in UI and functionality. Neither App Store version include hidden files, so aren't going to find those leftover caches. The App Store version of Disk Space Analyzer is free, but it's unclear how much functionality is missing (ie. The App Store version of Daisy Disk also costs USD $9.99, but if you've bought it from the App Store you can get the download version for free. The paid download versions of both cost the same, USD $9.99.
The App Store versions of both ( ) and Daisy Disk are limited functionality compared to the versions available from the developers' websites:
