puddletag is an audio tag editor (primarily created) for GNU/Linux similar
to the Windows program, Mp3tag. Unlike most taggers for GNU/Linux, it uses
a spreadsheet-like layout so that all the tags you want to edit by hand
are visible and easily editable.
The usual tag editor features are supported like extracting tag
information from filenames, renaming files based on their tags by using
patterns and basic tag editing.
Then there’re Functions, which can do things like replace text, trim it,
do case conversions, etc. Actions can automate repetitive tasks. Doing web
lookups using Amazon (including cover art), Discogs (does cover art too!),
FreeDB and MusicBrainz is also supported.
Supported formats: ID3v1, ID3v2 (mp3), MP4 (mp4, m4a, etc.), VorbisComments
(ogg, flac), Musepack (mpc), Monkey’s Audio (.ape) and WavPack (wv).

Pacman is the package manager used by the Arch distribution. It is a
frontend for the ALPM (Arch Linux Package Management) library.

Dust is meant to give you an instant overview of which directories are using disk space without requiring sort or head. Dust will print a maximum of one 'Did not have permissions message'.

fclones - Finds duplicate, unique, under- or over-replicated files

A simple command-line utility program that finds duplicate, unique, under- or over-replicated files. Contrary to fdupes or rdfind, fclones processes files in parallel, which makes it very efficient on SSDs. fclones communicates through standard Unix streams and it can write reports in human- and machine-friendly formats, therefore you can easily combine it with other tools.