there are several methods to install an application or program on fedora. i will be covering fedora 27 as that is the latest as the time of this writing. previous versions had different methods. if i recall correctly it used to be called "software center"
fedora 27 (kde) has the following 2 installed by default
of course we mustn't forget the command line or CLI
yum -y install $software
where software is the name of the application you want to install. most often it is in lower case