Some proposals on software I often use and can recommend without restrictions.

👨‍💻⚙️🪛🧰👨‍🔧

3D Print & Modelling

Name Platform Type Logo
Blender Windows Linux Open Source Blender

Archiver & Compression

Name Platform Type Logo
7Zip Windows Linux Open Source 7Zip

Audio

Name Platform Type Logo
Audacity Windows Linux Open Source Audacity
fre:ac Windows Linux Open Source fre:ac
WinAmp Windows Closed Source WinAmp

Coding

Name Platform Type Logo
Eclipse Windows Linux Open Source Eclipse
Notepad++ Windows Open Source notepad++

DVD & Bluray

Name Platform Type Logo
InfraRecorder Windows Open Source InfraRecorder
K3b Linux Open Source K3B
MakeMKV Windows Linux Closed Source MakeMKV

Graphics Manipulation

Name Platform Type Logo
InkScape Windows Linux Open Source InkScape
GIMP Windows Linux Open Source GIMP

Media Player

Name Platform Type Logo
Kodi Windows Linux Android Open Source kodi
Video Lan Client Windows Linux Android Open Source VLC

Network

Name Platform Type Logo
FileZilla Windows Linux Open Source FileZilla
PuTTy Windows Linux Open Source PuTTy
WinSCP Windows Open Source WinSCP

Office

Name Platform Type Logo
LibreOffice Windows Linux Open Source LibreOffice
Scribus Windows Linux Open Source Scribus

PDF

Name Platform Type Logo
PDFCreator Windows Open Source PDFCreator
PDFtk Windows Closed Source PDFtk
PDF X-Change Editor Windows Closed Source PDF X-Change Editor

Security & Encryption

Name Platform Type Logo
GnuPG Windows Linux Open Source GnuPG
KeePass Windows Linux Android Open Source KeePass
VeraCrypt Windows Linux Open Source VeraCrypt

Tagging

Name Platform Type Logo
easyTag Windows Linux Open Source easyTag
MKVToolNix Windows Linux Open Source MKVToolNix
mp3Tag Windows Open Source mp3tag

Video

Name Platform Type Logo
Handbrake Windows Linux Open Source Handbrake
OpenShot Windows Linux Open Source OpenShot
XMedia Recode Windows Open Source XMedia Recode

WWW & Mail

Name Platform Type Logo
FairEmail Android Open Source FairMail
Firefox Windows Linux Android Open Source Firefox
Thunderbird Windows Linux Open Source Thunderbird

Legend
Platform Type
Windows Windows
Linux Linux
Android Android
Open Source Open Source
Closed Source Closed Source

If you have any suggestions on substitutes for the given listings, I am happy to hear! 🧏‍♂️