Packrat is a project mainly written in C, it's free.
Package manager for AmigaOS and Amiga-like OS's (AROS etc.)
Packrat is the working name for a new Amiga (taken to mean AmigaOS 3.x, 4.x, AROS and MorphOS) package manager.
It's goal is to be simple, self-contained and to respect Amiga conventions whenever possible. It should also be easily portable, to take into account users and developers using UAE or developing on a non-Amiga machine.
This archive is itself ready to be packaged up as a Packrat package, and demonstrates the structure and features of Packrat.