ECM (Error Code Modeler) compresses CD image files (such as BIN, CDI, NRG, CCD,
or similar) by stripping unnecessary EDC/ECC data.
The space saved depends on the number of sectors with unnecessary EDC/ECC data
in them, which will depend on the specific type of CD.
Lzip is a lossless data compressor with a user interface similar to the one
of gzip or bzip2. Lzip decompresses almost as fast as gzip and compresses
more than bzip2, which makes it well suited for software distribution and
data archiving. Lzip is a clean implementation of the LZMA algorithm.
The lzip file format is designed for long-term data archiving. It is
clean, provides very safe four factor integrity checking, and is backed
by the recovery capabilities of lziprecover.
[ excerpt from developer's web site ]
JZlib is a re-implementation of zlib in pure Java. The first and
final aim for hacking this stuff is to add the packet compression
support to pure Java SSH systems.
- Why JZlib?
Java Platform API provides packages 'java.util.zip.*' for accessing
to zlib, but that support is very limited if you need to use the
essence of zlib. For example, we needed to full access to zlib to
add the packet compression support to pure Java SSH system, but
they are useless for our requirements. The Internet draft SSH
Transport Layer Protocol says in the section '4.2 Compression' as
follows,
LZX compression engine, suitable for creating compressed CHM files. Or
for use in a CAB-making utility or for any other purpose LZX is useful for.
libzip is a C library for reading, creating, and modifying zip
archives. Files can be added from data buffers, files, or compressed
data copied directly from other zip archives. Changes made without
closing the archive can be reverted. The API is documented by man
pages.
makeself is a (very small) shell script that makes neat
self-extracting shell scripts, and allows you to specify a "setup"
command to execute upon finishing.
It's sorta like the Windows winzip self-extracting archives.
PackdDir creates and unpacks PackdDir archives,
which are used in Quake (I and II) and others.
Mark Adler, maintainer of popular zlib library has released a multicore
capable Parallel Implementation of GZip, nicknamed PIGZ. Version 1.5
implements nearly all of gzip's functionality, including decompression
of .gz and .Z (Unix compress) files.
Linux ports of KZIP and ZIPMIX by Ken Silverman.
A PKZIP-compatible compressor focusing on space over speed. KZIP
creates smaller .ZIP files than PKZIP with maximum compression
enabled and even beats 7-Zip most of the time.
Celestia is a free real-time space simulation that lets you experience our
universe in three dimensions. Unlike most planetarium software, Celestia
doesn't confine you to the surface of the Earth. You can travel throughout
the solar system, to any of over 100,000 stars, or even beyond the galaxy.
All travel in Celestia is seamless; the exponential zoom feature lets you
explore space across a huge range of scales, from galaxy clusters down to
spacecraft only a few meters across. A "point-and-goto" interface makes it
simple to navigate through the universe to the object you want to visit.
Celestia is expandable. It comes with large catalog of stars, galaxies,
planets, moons, asteroids, comets, and spacecraft. If that's not enough,
you can download dozens of easy to install add-ons with more objects.