Ubuntu comes with a variety of open-source applications that can serve as alternatives to popular Windows or macOS software.
Default applications in a fresh install of Ubuntu include Firefox, LibreOffice, Files, calendar, music player, and photo viewer.
Ubuntu's Software Center allows users to easily browse, install, and update applications without the need for .exe installers.
In Linux, there are terminal-only tools and server applications like top, lsblk, fdisk, OpenSSH, and MySQL that offer powerful functionalities without a graphical interface.