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p7zip is a Unix port of 7-Zip, a file archiver with high compression ratio (www.7-zip.org) with lots of features: * 7-Zip is free software distributed under the GNU LGPL * High compression ratio in new 7z format with LZMA compression o Unicode file names o Variable dictionary size (up to 4 GB) o Compressing speed: about 1 MB/s on 2 GHz CPU o Decompressing speed: about 10-20 MB/s on 2 GHz CPU * Supported formats: o Packing / unpacking: 7z, ZIP, GZIP, BZIP2 and TAR o Unpacking only: RAR, CAB, ISO, ARJ, LZH, CHM, Z, CPIO, RPM, DEB and NSIS * For ZIP and GZIP formats 7-Zip provides compression ratio that is 2-10 % better than ratio provided by PKZip and WinZip * Self-extracting capability for 7z format

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.

Secure Tar (star) doesn't create encrypted tape archives (tar files) yet, but it can encrypt/decrypt files only using multiple blocksizes, and keysizes using the AES algorithm Rijndael. Once the standalone app is stable, then it will be incorporated with tar. The encryption is exported under exemption TSU 740.13.

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.

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.

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)

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.

This is sscalc, a sunrise/sunset time calculator, ported to C. You can find the sunrise and sunset times for anywhere in the world as long as you know the latitude and longitude of the location. The program is a port of the JavaScript program located at http://www.srrb.noaa.gov/highlights/sunrise/gen.html The page was written by Aaron Horiuchi, Chris Lehman and Chris Cornwall.

GpsPrune is an application for viewing, editing and converting coordinate data from GPS systems. Basically it's a tool to let you play with your GPS data after you get home from your trip. It can load data from arbitrary text-based formats (for example, any tab-separated or comma-separated file) or Xml, or directly from a GPS receiver. It can display the data (as map view using openstreetmap images and as altitude profile), edit this data (for example delete points and ranges, sort waypoints, compress tracks), and save the data (in various text-based formats). It can also export data as a Gpx file, or as Kml/Kmz for import into Google Earth, or send it to a GPS receiver.

Ario is a GTK2 client for MPD (Music player daemon). The interface used to browse the library is inspired by Rhythmbox but Ario aims to be much lighter and faster.