Welcome! 
Next time when you want to install something, use either pacman (for official packages only) or yay (both official and AUR packages).
For example, evillimiter can be installed with
yay -S evillimiter
and it is easy to uninstall with yay as well (yay -R package-name).
To search packages on the command line, you can use command
pacman -Ss word(s) # official
yay -Ss word(s) # AUR
You can also look at AUR packages here and official packages here.