Ofcourse you can go and google on keywords like “best linux software 2017” but you can also install an application that will give any linux beginner a good head start.
Type in the terminal
With gnome-software you will have an application that will provides you an overview of well known linux applications.
You can use gnome-software to install the application rather then using a terminal and packer/pacman as commands. Keep in mind that if you install software, you will always be installing its dependencies as well.Meaning more megabytes will be used. If that is not an issue, just try them out. It might be an idea to install any and all of them. If you know what applications you want after some experimenting, you can do a clean install and then just install the applications you liked.