app-arch/afio
makes cpio-format archives and deals somewhat gracefully with input data corruption.
Screenshots
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afio-2.5alpha amd64 ~hppa ppc sparc x86
View 
Download License: Artistic LGPL-2
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afio-2.4.7x86 ppc sparcView Download License: Artistic LGPL-2
Reverse Dependencies
Reverse dependancies are sometimes conditional based on your USE flags, Ebuild version and sometimes other packages. please keep this in mind.