Core
Operating system: Xubuntu (18.04 LTS)
Package Manager: Synaptic Package Manager
Terminal: Yakuake
Misc: Gufw firewall, KSysGuard, xscreensaver

Productivity
Office: LyX (2.3.3), LibreOffice
Programming: Visual Studio Code
Graphics: Photopea

Communication & privacy
Browser: Vivaldi
↳︎ security: uBlock Origin, uMatrix (How to use?), HTTPS Everywhere
↳︎ convenience: Grammarly, TransOver, ImprovedTube, scroll configurator
DNS: 1.1.1.1
Email: ProtonMail
Chat: Telegram
IRC: Quassel IRC

Utilities
Cloud storage: MEGA
Macros: Autokey, AutoHotkey
Screenshots: imgur-screenshot, ShareX
Media player: SMPlayer
Calculator: SpeedCrunch
Eye health: Redshift, f.lux
Torrent: Transmission
Corsair mouse driver: ckb-next

Games
lichess.org