When I last installed Slackware, Pidgin came with it, but I can't recall which version.
is a great resource.
Nevertheless, I would recommend that you learn how to compile and install from sources. Some folks I know joke that "tar.gz is the native Slackware installation format" and they are not actually very far off the mark.
It's not that difficult and you will learn a lot along the way.
Once you learn how to use Slackware, no Linux distro can ever intimidate you.