slapt-get is an APT like system for Slackware package management.
slapt-src is a utility to make querying, retrieving, and building slackbuilds as easy as working with binary packages with slapt-get.
GSlapt is a GTK version of slapt-get.
slapt-update-service is a DBus service which notifies about package updates available via slapt-get and gslapt