Unzoo is a zoo archive extractor written by Martin Schoenert. If unzoo is
called with no arguments, it will first print a summary of the commands and
then prompt for command lines interactively.
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.
LHa for UNIX with autoconf
XMill is a new tool for compressing XML data efficiently. It is based
on a regrouping strategy that leverages the effect of highly-efficient
compression techniques in compressors such as gzip. XMill groups XML
text strings with respect to their meaning and exploits similarities
between those text strings for compression. Hence, XMill typically
achieves much better compression rates than conventional compressors
such as gzip.
Zipper is a tool for extracting and viewing archive files in GNUstep.
LICENSE: Public Domain
The Zip-Ada library is written entirely in Ada, allowing compression
operations without any OS-dependent external calls on streams and files.
In addition to the library and command-line demos, it has these tools:
* zipada - create compressed Zip archive
* comp_zip - utility to compare contents of two Zip archives
* find_zip - utility to search for text stream of Zip archive
* rezip - tool for recompressing Zip archives towards optimal compression
* debzip2 - tool to decompress BZip2 compressed files (.bz2)
Zstd, short for Zstandard, is a real-time compression algorithm providing
high compression ratios. It offers a very wide range of compression vs.
speed trade-offs while being backed by a very fast decoder. It offers
a special mode for small data called "dictionary compression" and it can
create dictionaries from any sample set. Zstd is BSD-licensed.
Using Izbench on the Silesia compression corpus, zstd ranked at the
top with a compression ratio of 2.877, a compression rate of 325 Mb/s,
and a decompression rate of 325. Zlib followed at 2.730, 95 Mb/s (C)
and 360 Mb/s (D). See WWW page for the full benchmark results.
Accrete is a physical simulation of solar system planet formation,
originally published to Usenet-- probably comp.sources.unix-- in 1991
by Joe Nowakowski. This software is in the public domain.
This simulation works by modelling a dust cloud around a Sun-like
star, injecting a series of masses which collect dust, and form
planets. The simulation then determines what the planetary
environments will be like in terms of temperature, atmospheric
composition, and other factors. The system description is saved to a
file named "New.System".
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.
KStars is a desktop planetarium for KDE. It provides an accurate
graphical simulation of the night sky, from any location on Earth, at
any date and time. The display includes up to 100 million stars,
13,000 deep-sky objects, all 8 planets, the Sun and Moon, and
thousands of comets and asteroids.