Parity Archive
parchive uses Reed-Solomon coding to make multiple parity volumes from
the same set of files. What this means is that you can recover as
many files as you have recovery volumes. Any recovery volumes for
that set will do.
Parity v2 Archive create/verify/recover
par2cmdline is a program for creating and using PAR2 files to detect
damage in data files and repair them if necessary. It can be used with
any kind of file. Par files are especially popular on Usenet.
PBZIP2 is a parallel implementation of the bzip2 block-sorting file compressor
that uses pthreads and achieves near-linear speedup on SMP machines. The output
of this version is fully compatible with bzip2 v1.0.2 (ie: anything compressed
with pbzip2 can be decompressed with bzip2).
Horde package providing an API to various compression techniques.
Horde_Compress_Fast - Fast Compression Library
Provides compression suitable for packing strings on-the-fly in PHP code (as
opposed to more resource-intensive compression algorithms such as DEFLATE).
Horde replacement for serialize()/json_encode() that will automatically use the
most efficient serialization available based on the input.
PeaZip, free archiver utility, Open Source WinRar / WinZip alternative for
Windows, Linux and FreeBSD. Compress to 7Z, ARC, BZ2, GZip, PAQ, PEA,
self-extracting archives, TAR, WIM, XZ, ZIP files. Open 150+ file types,
including ACE, CAB, DMG, ISO, RAR, UDF, ZIPX format. Extract, create and
convert archives, split / join files, strong encryption, encrypted password
manager, secure delete, find duplicate files, compute hash, export job
definition as script to automate backup / restore.
QuaZIP is a simple C++ wrapper over Gilles Vollant's ZIP/UNZIP package that
can be used to access ZIP archives. It uses Trolltech's Qt toolkit.
The RPM Package Manager is a powerful command line driven package
management system capable of installing, uninstalling, verifying,
querying, and updating computer software packages. Each software
package consists of an archive of files along with information about
the package like its version, a description, and the like. There
is also a related API ("Application Program Interface"), permitting
advanced developers to bypass 'shelling out' to a command line, and
to manage such transactions from within a native coding language.
rzip is a compression program, similar in functionality to gzip or bzip2, but
able to take advantage from long distance redundancies in files, which can
sometimes allow rzip to produce much better compression ratios than other
programs.
The principal advantage of rzip is that it has an effective history buffer of
900 Mbyte. This means it can find matching pieces of the input file over huge
distances compared to other commonly used compression programs. The gzip
program by comparison uses a history buffer of 32 kbyte and bzip2 uses a
history buffer of 900 kbyte. The second advantage of rzip over bzip2 is that it
is usually faster. This may seem surprising at first given that rzip uses the
bzip2 library as a backend (for handling the short-range compression), but it
makes sense when you realise that rzip has usually reduced the data a fair bit
before handing it to bzip2, so bzip2 has to do less work.