Free 15 software for linux

jac is a Cd-Player which runs under Linux (but I hope to port it to other Unix-like platform). Its birth is due to my need of a command line cd player, and now it offers many features (including the "exclusive" crazy-playing mode) and also a small text-console from which you can set any option, play the cd in the way you want etc.
jac has support for many languages but at this time only Italian and English languages are available for use (Im looking for someone who want to write some translations). jac can also download Cd and track information from CDDB and from CdIndex A FAQ PAGE is available (but is obsolete).
Enhancements:
- Readline and history support in console
- Short and long option support
- Configuration file update for CD default option
- Cdrom and mixer device can be set from command line overriding configuration file
- Error description for CDDB and CDIndex
- MAN page
- Command implementation in console
- Bug fixing

z80ex is a portable ZiLOG Z80 CPU emulator designed as a library.
Goals include precise opcode emulation (documented and undocumented), exact timings for each opcode (including I/O operations), and simultaneous operation of several virtual CPUs.
Main features:
- precise opcode emulation (documented & undocumented)
- exact timings for each opcode (including I/O operations)
- full support for all interrupt modes
- allows simultaneous operation of several virtual CPUs
- written in pure ANSI C
- compiles as a library, which may be used via simple callback-based API
Building and installation (*):
for build using GNU C (GCC - unix, mingw/cygwin - Win32, DJGPP - DOS(**)),
type gmake. static and shared libraries will appear in "./lib".
also you may do "gmake static" for building only static library,
or "gmake shared" for only shared library.
after successful build, issue "gmake install" as superuser.
default install prefix is /usr/local, which can be changed in Makefile.
*)
support for non-GNU build methods isnt included at the moment,
feel free to contribute :)
**)
when building with DJGPP, use "gmake static" -- DOS doesnt support
shared libraries
Usage:
include < z80ex.h > in your sources,
and link with "libz80ex" (-lz80ex).
no API documentation written yet, see comments in "z80ex.h".
Enhancements:
- (major bugfix release) - nasty deadlock in IM0 mode was eliminated 29.03.2006

Exiv2 comprises of a C++ library and a command line utility to access image metadata. Exiv2 is free software and it is released under the GPL Public License.
Exiv2 is also a command line utility to
- print the Exif metadata of Jpeg images as summary info, interpreted values, or the plain data for each tag (here is a sample)
- print the Iptc metadata of Jpeg images
- print the Jpeg comment of Jpeg images
- set, add and delete Exif and Iptc metadata of Jpeg images
- adjust the Exif timestamp (thats how it all started...)
- rename Exif image files according to the Exif timestamp
- extract, insert and delete Exif metadata, Iptc metadata and Jpeg comments
- extract, insert and delete the thumbnail image embedded in the Exif metadata
Main features:
1. full read and write access to the Exif and Iptc metadata of an image through Exiv2 keys and standard C++ iterators
2. a smart Iptc implementation that does not effect data that programs like Photoshop store in the same image segment
3. Exif MakerNote support:
-MakerNote tags can be accessed just like any other Exif metadata
-a sophisticated write algorithm avoids corrupting the MakerNote:
o the MakerNote is not re-located if possible at all, and
o MakerNote Ifd offsets are re-calculated if the MakerNote needs to be moved (for known Ifd MakerNotes)
4. new camera make/model specific MakerNotes can be added to the library with minimum effort in OO-fashion (by subclassing MakerNote or IfdMakerNote)
5. extract and delete methods for Exif thumbnails (both, Jpeg and Tiff thumbnails)
6. set methods for Exif thumbnails (Jpeg only, Tiff thumbnails can be set from individual tags)
7. complete API documentation (by Doxygen)
8. generic lower-level classes to access Ifd (Image File Directory) data structures
Enhancements:
- This maintenance release fixes a number of bugs, adds support for Minolta G500 RAW files, and has minor tag updates and some larger translation updates.

gmpc project is a gtk2 frontend for the mpd.
Gmpc is a user-friendly frontend for mpd (www.musicpd.org). Its written in gtk2.
Main features:
- Support for loading/saving playlists.
- File Browser
- Browser based on ID3 information. (on artist and albums)
- Search
- Current playlist viewer with search.
- ID3 information
- Lots more

MRTG short from Multi Router Traffic Grapher is a tool to monitor the traffic load on network-links.
Routers are only the beginning. MRTG is being used to graph all sorts of network devices as well as everything else from weather data to vending machines.
MRTG is written in perl and works on Unix/Linux as well as Windows and even Netware systems.
Enhancements:
- SNMVv3 handling was improved.
- Support for SNMPv2/3 devices WITHOUT HC counters was added.
- Indexmaker parsing was made more robust.
- Netware support was updated.

NumExp is a family of open-source applications for numeric computation. When it was created, the idea was to make a powerfull tool like Mathematica.

Now, we know this is almost impossible without more open-source hackers. Meanwhile, we are trying to make, at least, an usefull tool!

NumExp is based on a server with the NumExp core functionalities. This server comunicates with potencial clients using a simple Corba interface

Whats New in This Release:

A new parser has been done. We have new syntaxes with it:
* f() and f(a) are recognized as functions.
* Expressions can be separated by a semi-colon or a new line,
so we can enter a=2;++a on a command line.
* Matrices are now delimited by {}.
* The star is now needed for a product.
- New instruction:
* "if" has also the structure
if a>0 then [
print["coucou"]
] else [
print["hibou"]
]
* while works also like this
while toto<<less