tool for installing deb files

 QApt is a collection of tools and a library providing a wrapper around
 APT. The intention is to ease the use of APT in Qt-based programs.
 .
 The QApt deb installer allows you to install local .deb files. The QApt Deb
 Installer resolves and downloads dependencies. The APT package manager does
 the same, but only for remote packages.