Free Open Source Software

The obvious ones

• Firefox (Browser)
• Thunderbird (Mail Client)
• Chromium (Browser)
• VSCodium (IDE)
• VLC (Media Player)
• OBS (Broadcasting Software)
• 7zip (File Archiver)
• OpenOffice
• LibreOffice
• Audacity (Audio Recorder and Editor)
• many programming languages and tools

Helpful stuff

• Ventoy (bootable USB drive for ISOs)
• Ninite (bundled installer)
• Chocolatey (package manager for Windows)
• Scoop (package manager for Windows)
• Notepad++ (Text editor)
• PuTTY (SSH and telnet client)
• Blender (3D Modeling/Rendering)
• Inkscape (Image Editor)
• Ardour (Music Production)
• OnlyOffice (Online Office Software)
• Joplin (Note App)
• Obsidian (Note App)
• MPV (Media Player)

Search for yourself

• https://fosshub.com/
• https://itsfoss.com/