spi
A meta package manager that handles both packages and slackbuilds.
TLDR
Update the list of available packages and slackbuilds
$ spi --update
Install a package or slackbuild
$ spi --install [package/slackbuild_name]
Upgrade all installed packages to the latest versions available
$ spi --upgrade
Locate packages or slackbuilds by package name or description
$ spi [search_terms]
Display information about a package or slackbuild
$ spi --show [package/slackbuild_name]
Purge the local package and slackbuild caches
$ spi --clean