alien

pkg++   (Compare Project)

Mostly written in Lua

License: BSD-3-Clause, gpl3

Open Build Service   (Compare Project)

Mostly written in Ruby

License: gpl

Smart Package Manager   (Compare Project)

License: gpl

DeploymentKit   (Compare Project)

Mostly written in Python

License: lgpl21_or_later

dpkg   (Compare Project)

Mostly written in C

License: bsd_2clause_ish, gpl2_or_later, GNU_General_Public_License_v2_0_only, gpl, Public_Domain

Aptitude   (Compare Project)

License: gpl

Synaptic Package Manager   (Compare Project)

Mostly written in C++

License: gpl

Lintian   (Compare Project)

License: gpl

aptly   (Compare Project)

Mostly written in Go

License: mit

Debreate - Debian Package Builder   (Compare Project)

Mostly written in Python

License: mit, QTail