WxMaxima is a document based interface for the computer algebra system Maxima.

WxMaxima is a document based interface for the computer algebra system Maxima. wxMaxima uses wxWidgets and runs natively on Windows, X11 and Mac OS X. wxMaxima provides menus and dialogs for many common maxima commands, autocompletion, inline plots and simple animations. wxMaxima is distributed under the GPL license. 

Maxima is a system for the manipulation of symbolic and numerical expressions, including differentiation, integration, Taylor series, Laplace transforms, ordinary differential equations, systems of linear equations, polynomials, and sets, lists, vectors, matrices, and tensors. Maxima yields high precision numeric results by using exact fractions, arbitrary precision integers, and variable precision floating point numbers. Maxima can plot functions and data in two and three dimensions.

The Maxima source code can be compiled on many systems, including Windows, Linux, and MacOS X. The source code for all systems and precompiled binaries for Windows and Linux are available at the SourceForge file manager.

Maxima is a descendant of Macsyma, the legendary computer algebra system developed in the late 1960s at the Massachusetts Institute of Technology. It is the only system based on that effort still publicly available and with an active user community, thanks to its open source nature. Macsyma was revolutionary in its day, and many later systems, such as Maple and Mathematica, were inspired by it.

The Maxima branch of Macsyma was maintained by William Schelter from 1982 until he passed away in 2001. In 1998 he obtained permission to release the source code under the GNU General Public License (GPL). It was his efforts and skill which have made the survival of Maxima possible, and we are very grateful to him for volunteering his time and expert knowledge to keep the original DOE Macsyma code alive and well. Since his passing a group of users and developers has formed to bring Maxima to a wider audience.

We are constantly updating Maxima, to fix bugs and improve the code and the documentation. We welcome suggestions and contributions from the community of Maxima users. Most discussion is conducted on the Maxima mailing list.

Download.

The latest version of wxMaxima is 11.04.0.

• Source code: wxMaxima 11.04.0
• Windows: wxMaxima 11.04.0 is included with Maxima 5.24.0
• Mac OS X: wxMaxima 11.04.0 is included with Maxima 5.24.0

All files released so far are available from sourceforge project page. 

Screenshots.

 

Xmaxima 5.18 running on Linux (with Tk 8.5) with the Embedded plot windows option

 

Xmaxima running on Windows

 

Maxima running in GNU Emacs

 

Maxima 5.18 running in command line mode in Linux

 

Maxima running in GNU TeXmacs

Maxima running in GNU Emacs with Imaxima mode

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Poseidon Linux is a GNU/Linux distribution designed for academic and scientific use.

Poseidon Linux is a GNU/Linux distribution designed for academic and scientific use.

Although based on Ubuntu, it enhances its parent by adding a large number of applications for GIS/maps, numerical modelling, 2D/3D/4D visualisation, statistics, tools for creating simple and complex graphics, programming languages and more.

The usual software for daily use, such as office suite, Internet browser, instant messaging and chat clients are also included.

Poseidon Linux is full GNU/Linux distribution, a complete operating system, originally based on Kurumin, now based on Ubuntu. It is developed and maintained by a team of young scientists from the Rio Grande Federal University Foundation in Rio Grande do Sul, Brazil, and the MARUM institute, in Germany.

Updates (via Distrowatch):

Gonzalo Velasco has announced the release of Poseidon Linux 4.0, an Ubuntu-based distribution with focus on scientific computing: "Poseidon Linux 4.0 is here. Our new release is based on Ubuntu 10.04 LTS (with 3 years of updates guaranteed by Canonical) as our goals are stability, usability and support for the whole system when used professionally at universities, institutes, colleges and at home. Poseidon Linux is a GNU/Linux distribution designed for the academic and scientific community; it includes a large number of scientific applications, covering areas such as: GIS and geostatistics, visualization, mathematics, statistics, physics, chemistry, CAD, engineering, computer graphics, image editing and vector drawing, numeric modelling and simulation, scientific graphs, scientific authoring...."

Visit the project's home page to read the full release announcement.

Download: Poseidon_Linux4_32bit.iso (3,731MB, MD5).

Recent versions:

  • 2011-07-28: Distribution Release: Poseidon Linux 4.0

 • 2008-11-27: Distribution Release: Poseidon Linux 3.1

 • 2008-07-03: Distribution Release: Poseidon Linux 3.0

Software:

This is the detailed list of the main programs included in Poseidon Linux 3.2:

PS: You didn't saw your favorite software? submit a request by email :-)

GIS/Mapping:

• SPRING 5.0
• GRASS 6.4.0 RC 5+ plugins GDAL 1.4.4 and OGR 1.4.4
• GMT 4.5.2
• PROJ 4.6
• QGIS 1.4 + plugins (including GRASS Plugin)
• Terraview 3.2 Plus
• MB System 5.1.3beta1855
• GPS Manager
• GPS Drive
• Mapserver 5.0 + Pmapper 3.2 (don't work running from live-DVD, just work installed on a PC)
  

Visualization (2D/3D/4D):

• OpenDX 4.4.0

Statistics and Math:

• R 2.9.2 + many libraries (GeoR, GeoRglm, GStat, GAM, GRASS, abind, car, effects, lmtest, multicomp, mvtnorm, relimp, rgl, sandwich, sm, strucchange, zoo) + graphical interface for R (using his library, Rcmdr) 

Numerical Modelling:

• Octave 3.0 + Gnuplot

CAD:

• QCAD (2D CAD)

Computer Graphics (CG):

• Blender

Database:

• Postgresql 8.3 + addon PostGIS 1.3 (module to work with GIS data)

Scientific Authoring:

• Kile
  
• Lyx 

Scientific Graphics:

• Dia
• Gri 2.12.16
• LabPlot
• Qtiplot
• Fityk

Compilers/Programming Languages:

• GCC (C and C++ compiler) 
• G77 (Fortran compiler)
• Lua
  
• Python

Multimedia:
 

• 
  

Office:

• OpenOffice 3.1

Internet:

• Mozilla FireFox
• Thunderbird
• TightVNC
• XChat
• aMSN
• Pidgin
• Evolution
• gFTP

Graphics and Image Editing:

• Gimp 2.4.5
• XFig
• F-Spot
• gThumb
• XSane
• Inkscape 

Extras:

• Alien (Convert .RPM to .DEB)
• Vim
• DosBox (DOS emulator)
• Sysutils (Tools to convert ASCII text files from DOS to UNIX, and UNIX to DOS)
• Gnuplot
• Tools for Palm sync
• QEmu (free emulator, runs another OS in a window)

The name ("Poseidon" was the regent of the sea in Greek mythology) derives from the large number of oceanologists involved in the development of the system.

It contains many free software programs used by students, professors, technicians and scientists, such as the Fortran programming language, Kile and Lyx for scientific writing, numerical modeling, 2D/3D/4D visualization, statistics, CAD, Genetics, Bio-Informatics and several tools that support GIS and mapping... along with day-by-day common utilities like LibreOffice (with many spell-checkers), internet surfing, multimedia, etc. (even some games).[2]

Due to its wide acceptance also outside the Portuguese-speaking scientific community and to the eventual shut down of the Kurumin project,[3] the Poseidon project has changed the base distribution to Ubuntu, to allow the installation in Portuguese, Spanish, English, German, French, Greek and more languages. The core of Poseidon is always the Debian family due to the higher stability and great amount of software available into the repository sites. Also, users of any other Debian or Ubuntu derivative distribution would find no trouble to use Poseidon. Many of the supporting material and tutorials apply fully to it.

The current running version is 4.0, and it is based on Ubuntu 10.04 LTS [[1]] 32 bits, and soon 64 bits, since the goal of Poseidon is not to deliver one new distro after another, but to deliver a solid, usable and trustful distro for professional, educational, and home computers, that will be updated when the special packages and the base system requires so.

The 3.x family was pre-presented at the 9th Free Software International Forum (2008) - FISL9.0.[4], and received compliments from many users, free-software enthusiasts, the GNU/Linux community and even from Jon "maddog" Hall, from Linux International. Version 3.2 (previous) was officially released in the IV Brazilian Oceanography Congress, that took place in Rio Grande, Brazil, in May 2010.

Screenshots.

 

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DjView4 is a new portable DjVu viewer and browser plugin.

DjVu is a web-centric format and software platform for distributing documents and images. DjVu can advantageously replace PDF, PS, TIFF, JPEG, and GIF for distributing scanned documents, digital documents, or high-resolution pictures.

DjVu content downloads faster, displays and renders faster, looks nicer on a screen, and consume less client resources than competing formats.

DjVu images display instantly and can be smoothly zoomed and panned with no lengthy re-rendering.

DjVuLibre is an open source (GPL'ed) implementation of DjVu, including viewers, browser plugins, decoders, simple encoders, and utilities.

DjView4 is a new portable DjVu viewer and browser plugin.
Highlights:

• Entirely based on the public djvulibre api.
• Entirely written in portable Qt4.
• Works with Qt/X11, Qt/Mac, and Qt/Windows.
• Continuous scrolling of pages
• Side-by-side display of pages
• Ability to specify a url to the djview command
• All plugin and cgi options available from the command line
• All silly annotations implemented
• Display thumbnails as a grid
• Display outlines
• Page names supported (see djvused command set-page-title)
• Metadata dialog (see djvused command set-meta)
• Implemented as reusable Qt widgets

DjVuLibre contains:

• a standalone viewer for X11 that is built with the Qt GUI toolkit, and a small program that makes the viewer behave like a plug-in for all major Web browsers on Unix (Netscape-4.x, Netscape-6.x, Mozilla, Galeon, Konqueror, and Opera).
• a bunch of command line tools and scripts to create, manipulate and convert DjVu images and documents.
• a C++ library around which all of the above is built. This library can be used to build new viewers, new utilities, new compression algorithms, and even new codecs. It could (should) also be used to enable popular open source packages to support DjVu (Gimp, ImageMagick,....).

Here is a non exhaustive list of the commands included with DjVuLibre:

• c44: a wavelet-based continuous-tone image encoder (à la JPEG-2000).
• cjb2: single page encoder for bitonal images (black and white scans).
• cpaldjvu: encoder for palettized images (a la GIF, but better).
• bzz: a general-purpose data compressor (a la bzip2).
• djvused: a powerful command interpreter for manipulating DjVu documents.
• ddjvu: converts DjVu documents to PBM/PGM/PPM images.
• djvudump: displays the structure of a DjVu file.
• djvuextract: extracts chunks from a DjVu file.
• djvumake: assemble chunks into a DjVu file
• djvutxt: extract the "hidden text" from a previously OCRed DjVu document.

Download the latest version.
Unlike the previous viewer DjView3, this new viewer is distributed as a separate package. To compile from the sources, you must first install DjVuLibre (>=3.5.19) and Qt4 (>=4.3).

• version 4.7
• released 2011-03-06.
• Check out the full download page for previous versions

Screenshots.

Here are a few screenshots of the DjVuLibre viewer/plug-in showing various documents in Konqueror and Galeon.

DjVu version of a 16th century book scanned at 300dpi. The magnifier in the upper right corner shows the document at the scanning resolution (one screen pixel per document pixel). The page occupies 33KB. The plug-in's integrated thumbnail feature is shown on the left.		(Large JPEG) (Large PNG)
This shows the image resolution (2129x1899 pixels, 300dpi), and the size of each chunk. The text/foreground layer is 17.7KB. The other chunks contain the foreground colors and the background image. The last chunk contains the OCRed text.		(Large JPEG) (Large PNG)
An example of black and white document. This comes from the excellent Century Dictionary web site, the largest free English dictionary available on-line. Each page is scanned at 400dpi and occupies around 100KB.		(Large JPEG) (Large PNG)
Another page from the Century Dictionary. This shows the auto-hide tool bar at the bottom of the window.		(Large JPEG) (Large PNG)
A manuscript from the digital library website of the University of Georgia. The text and the background paper are separated and compressed separately.		(Large JPEG) (Large PNG)
Same document as above, with the background removed. The forground (text) and the background (paper and pictures) are separated at compression time and can be displayed separately by the DjVuLibre viewer.		(Large JPEG) (Large PNG)
A beautiful Arabic manuscript from the Czech National Library web site.		(Large JPEG) (Large PNG)
The Case Western Reserve University web site has several ancient documents in DjVu, with parallel text transcriptions.		(Large JPEG) (Large PNG)
A page from a radio-controlled airplane catalog. This document was not scanned but converted directly from the original digital files. The pages are at 300dpi and occupy 71KB on average. The red frame around the text in the upper right corner is a highlighted hyperlink embedded in the DjVu document.		(Large JPEG) (Large PNG)
A page from the IEEE Transaction on Information Theory web site hosted by UCSD. The popup window shows the size of each page (7 to 15KB) and the size of the shared shape dictionary (about 15KB worth of character bitmaps shared by all the pages). It shows the DjVu plug-in running in Galeon. Incidentally, the article shown is by Claude Shannon, the founder of Information Theory.		(Large JPEG) (Large PNG)
An example of technical paper from the NIPS Online web site scanned in B&W at 400dpi. The page is 7KB, and the whole 9 page article is 160KB.		(Large JPEG) (Large PNG)

Links:

• Leon Bottou: invented many of the techniques in DjVu, (wavelet coder, arithmetic coder, bitonal coder). Designed and wrote most of the core code too. Main author and maintainer of DjVuLibre. Leon's publications page has many technical papers on DjVu.
• Yann LeCun: initiated and led the DjVu project at AT&T. Designed this web site and several sites at DjVuZone.org. Wrote the JSS JavaScript Search Engine for client-side search of DjVu collections. Yann's publications page has many papers on DjVu in DjVu.
• Patrick Haffner: designed and wrote the foreground/background segmenter in DjVu.
• Yoshua Bengio: co-invented the ZP-coder.
• Paul Howard: co-authored the ZP-coder, designed the original JB2 bitonal compression from which DjVu's current bitonal compressor is derived.
• Bill Riemers: software architect for DjVu at LizardTech.
• Luc Vincent: director of applied research at LizardTech.
• Jeffery Triggs: created several DjVu-related web sites, including DjVuZone, and the Century Dictionary, as well as several server-side search systems for DjVu collections.
• DjVuZone: news, information, tutorials, demos, samples, technical papers, and links about DjVu.
• LizardTech:
• Any2DjVu: convert anything to DjVu. No frills.
• Bib2Web: upload a list of publications in BibTeX format together with the publication themselves in any format, and get a nice publication page with full-text search ready to post on you web site.

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Warsow is a completely free fastpaced first-person shooter (FPS) set in a futuristic cartoon-like world.

Warsow is a multiplayer first-person shooter computer game first publicly released on June 8, 2005. The game is in active development.

Warsow’s codebase is free and open source software, distributed under the terms of the GPL; it is built upon Qfusion, an advanced modification of the Quake II engine.

The artwork and other media are licensed under the proprietary Warsow Content License, which allows the contributors of this media to use the work in a "personal portfolio" but not in any other game.

Warsow is loosely based on the E-novel Chasseur de bots by Fabrice Demurger.The novel is the basis of the game's cyberpunk visual style, which is achieved by combining cel-shaded cartoon-like graphics with dark, flashy and dirty textures. Since visual clarity is important in maintaining competitive gameplay, Warsow tries to keep effects minimalistic, clear and visible.

The very competitive gameplay of Warsow focuses heavily on movement and trickjumps. Many of the tricks in Warsow, which originate from the Quake series, include circle-jumping, bunny hopping, strafe-jumping, double jumping, ramp-sliding, and rocket jumping.

Warsow also gives players the ability to dash, dodge or wall jump, tricks that were originally possible in the Unreal series. It uses a separate button for most of the special movements, making it easier to use them while doing other things at the same time.

Warsow 0.5 Official Trailer video – Mod DB

 

The various movement tricks combine to add an extra dimension to the gameplay; as the player's proficiency at moving increases, they are able to collect health, armour and weapons more quickly, and to overpower less capable enemies. The variety and flexibility of the physics has spawned an entire community dedicated to competing on the various Race maps that the game offers.

Warsow also has a unique power-up system for weapons. In addition to regular ammunition, ammo boxes found on the map contain strong ammunition. Strong ammo either increases a weapon's power or modifies its behaviour to make it more effective.

Weapons are restricted to using strong ammunition until depleted, at which point it would switch back to using regular ammunition. Unlike Unreal, Warsow weapons do not have an "alternate fire" option (pressing a different button to use different attacks with the same weapon).

Firefox plugin.

One of the things I’ve been working on (and off!) in the past 6 months is a simple addon/plugin for Firefox, which allows you to embed a Warsow instance into a web page. I’ve never played QL myself but I guess it does something similar. Of course to be able to use this plugin, that is: to able to actually play, spectate matches and watch demos you need the game itself installed locally. Here’s a short preview of the plugin:

This is how the plugin is listed among other installed addons in your Firefox:

A simple web page that embeds a streamed demo (that’s another thing added to Warsow itself – it can now stream demos over HTTP without pre-downloading them first):

Hovering your mouse pointer over the play button actually highlights it:

Left mouse button menu:

Oops, looks like this is our first run of the plugin and we didn’t use the windows installer:

All is set up, the demo is now loading:

Yup, it’s running:

Console also works:

Screenshots.

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