PowerPacker

File Format
Name	PowerPacker
Ontology	Electronic File Formats Compression PowerPacker
Extension(s)	.pp
Released	≤1989

PowerPacker (also spelled Power Packer or Power-Packer) is a file compression utility and compressed file format for Amiga computers. It was developed by Nico François, and distributed as shareware.

Identification

PowerPacker files apparently begin with ASCII "PP", followed by a two-digit version number. Known signatures are "PP11" and "PP20".

The reverse-engineered source suggests that password-protected files begin with "PX20".

Software

• aminet/util/arc → ppunpack*
• ppcrack
• Ancient
• http://aminet.net/package/util/arc/ppunpack10-mos (compiles and runs just fine on modern linux)
• https://github.com/lab313ru/powerpacker_src (Reverse Engineered source code of packer, ported to Windows.)
• Packer Algorithm Java Implementation
• The Unarchiver

Sample files

• Many, but not all, of the .pp files at http://cd.textfiles.com/amigagames/ag-199501/MultiMedia/Diskmags/ ...
• PPUnpackWOS.lha → sf.pp
• dexvert samples — archive/powerPack