Free 2.5.1 software for linux

R is a language and environment for statistical computing and graphics. R is a GNU project which is similar to the S language and environment which was developed at Bell Laboratories (formerly AT&T, now Lucent Technologies) by John Chambers and colleagues. R can be considered as a different implementation of S. There are some important differences, but much code written for S runs unaltered under R.
R provides a wide variety of statistical (linear and nonlinear modelling, classical statistical tests, time-series analysis, classification, clustering, ...) and graphical techniques, and is highly extensible. The S language is often the vehicle of choice for research in statistical methodology, and R provides an Open Source route to participation in that activity.
One of Rs strengths is the ease with which well-designed publication-quality plots can be produced, including mathematical symbols and formulae where needed. Great care has been taken over the defaults for the minor design choices in graphics, but the user retains full control.
R is available as Free Software under the terms of the Free Software Foundations GNU General Public License in source code form. It compiles and runs on a wide variety of UNIX platforms and similar systems (including FreeBSD and Linux), Windows and MacOS.
R is an integrated suite of software facilities for data manipulation, calculation and graphical display. It includes:
- an effective data handling and storage facility,
- a suite of operators for calculations on arrays, in particular matrices,
- a large, coherent, integrated collection of intermediate tools for data analysis,
- graphical facilities for data analysis and display either on-screen or on hardcopy, and
- a well-developed, simple and effective programming language which includes conditionals, loops, user-defined recursive functions and input and output facilities.
The term "environment" is intended to characterize it as a fully planned and coherent system, rather than an incremental accretion of very specific and inflexible tools, as is frequently the case with other data analysis software.
R, like S, is designed around a true computer language, and it allows users to add additional functionality by defining new functions. Much of the system is itself written in the R dialect of S, which makes it easy for users to follow the algorithmic choices made. For computationally-intensive tasks, C, C++ and Fortran code can be linked and called at run time. Advanced users can write C code to manipulate R objects directly.
Many users think of R as a statistics system. We prefer to think of it of an environment within which statistical techniques are implemented. R can be extended (easily) via packages. There are about eight packages supplied with the R distribution and many more are available through the CRAN family of Internet sites covering a very wide range of modern statistics.
R has its own LaTeX-like documentation format, which is used to supply comprehensive documentation, both on-line in a number of formats and in hardcopy.
Enhancements:
- This is a maintenance release, and fixes a number of mostly minor bugs and platform issues.

Python is an interpreted, interactive, object-oriented programming language. Python is often compared to Perl, Tcl, Scheme or Java.

Python combines remarkable power with very clear syntax. It has modules, classes, exceptions, very high level dynamic data types, and dynamic typing. There are interfaces to many system calls and libraries, as well as to various windowing systems (X11, Motif, Tk, Mac, MFC). New built-in modules are easily written in C or C++. Python is also usable as an extension language for applications that need a programmable interface.

The Python implementation is portable: it runs on many brands of UNIX, on Windows, OS/2, Mac, Amiga, and many other platforms. If your favorite system isnt listed here, it may still be supported, if theres a C compiler for it.

The Python implementation is copyrighted but freely usable and distributable, even for commercial use.

Python is an interpreted, object-oriented, high-level programming language with dynamic semantics. Its high-level built in data structures, combined with dynamic typing and dynamic binding, make it very attractive for Rapid Application Development, as well as for use as a scripting or glue language to connect existing components together.

Pythons simple, easy to learn syntax emphasizes readability and therefore reduces the cost of program maintenance. Python supports modules and packages, which encourages program modularity and code reuse. The Python interpreter and the extensive standard library are available in source or binary form without charge for all major platforms, and can be freely distributed.

Often, programmers fall in love with Python because of the increased productivity it provides. Since there is no compilation step, the edit-test-debug cycle is incredibly fast. Debugging Python programs is easy: a bug or bad input will never cause a segmentation fault. Instead, when the interpreter discovers an error, it raises an exception.

When the program doesnt catch the exception, the interpreter prints a stack trace. A source level debugger allows inspection of local and global variables, evaluation of arbitrary expressions, setting breakpoints, stepping through the code a line at a time, and so on.

The debugger is written in Python itself, testifying to Pythons introspective power. On the other hand, often the quickest way to debug a program is to add a few print statements to the source: the fast edit-test-debug cycle makes this simple approach very effective.

tkhangman project is a Tcl/Tk version of the classic hangman game.

It comes with a small word list, but can be used with existing dictionaries in text format.

KildClient is a mud client using the GTK toolkit. KildClients main feature is the support for Perl scripting, which allows you to do basically whatever you want.
Other standard features of mud clients (triggers, gags, macros, etc.) are also supported. It supports MCCP versions 1 and 2, and chat using the MudMaster and zChat protocols.
Main features:
- Support for Perl scripting. Perl statements can be executed by entering them prefixed with "/", or functions can be defined and called.
- Several worlds can be opened simultaneously.
- Easy switching between worlds with the tabs or Perl functions.
- New text notification.
- Plugins to extend the basic functionality.
- Triggers and gags, using regular expressions for matching.
- Aliases, allowing you to substitute what you type with some other text.
- Macros for sending text or executing commands with a single keypress.
- Timers for repeated execution of commands.
- Hooks for executing actions when some events happen.
- Support for logging the output to a file, including optionally a timestamp.
- A function to send multiple lines of text and/or the contents of a file to the world.
- Speed-walking feature to ease walking around.
- Transparent background, or an image can be used as background.
- Associate notes with a world (with the use an included plugin)
- Direct chat with other users of KildClient or of other clients compatible with the MudMaster or zChat protocols.
- Supports MCCP (Mud Client Compression Protocol) versions 1 and 2, to compress data sent from the server and thus reduce bandwidth.
Enhancements:
- The last openened world is not selected and displayed on-screen when the World Selector dialog is shown.
- The default strings for calling a browser and playing a sound now use quotes around the argument.
- The tooltip with information about the line is not shown anymore at the same time as the "Disconnected" message box, so it does not cover the buttons in that dialog.
- Bug fixed: If the kildclient.cfg file does not exist (which happens usually in the first run), KildClient does not crash anymore.
- Bug fixed: In single-line input mode, pressing Shift+Enter or CTRL+Enter now sends the line to the mud.
- Bug fixed: KildClient does not crash anymore if you try to connect to a world with invalid XML.

uPortal is a free, sharable portal under development by institutions of higher-education. This group sees an institutional portal as an abridged and customized version of the institutional Web presence... a "pocket-sized" version of the campus Web.
Portal technology adds "customization" and "community" to the campus Web presence. Customization allows each user to define a unique and personal view of the campus Web. Community tools, such as chat, forums, survey, and so on, build relationships among campus constituencies.
uPortal is an open-standard effort using Java, XML, JSP and J2EE. JA-SIG uPortal is a collaborative development project with the effort shared among several of the JA-SIG member institutions. You may download uPortal and use it on your site at no cost.
Enhancements:
- Various bugs were fixed.
- "Custom" is now displayed as a channel type in the Channel Manager.
- Version.java was modified to support security releases.
- The CAS uPortal security provider was moved into the source tree.

Downloader for X is a Linux/Unix userfriendly program with nice X interface to download files from the Internet. It supports both FTP and HTTP protocols, supports resuming (of course if server side supports it) and makes downloading files from internet easy. Downloader for X is an analogue for Linux/Unix of such famous applications for Windows as ReGet, Go!Zilla and GetRight.
Of course this program is not a copy of any of programs above. Downloader for X was written from scratch by me in the hope to decrease a pain of downloading many files from Internet even on really bad modem lines. But if you are happy owner of T1 connection then D4X is for you too because It can use this bandwidth completely! And this is not a end of the list of Downloader for Xs features!
Not completed list of key features:
- Supporting both FTP and HTTP protocols as well as HTTP and FTP proxy servers. SOCKS5 support is also included! Authentication on the proxy servers is supported too.
-The Program keep the logs of all download sessions that allows advanced user to monitor problems manualy according information from these logs.
- It allows users to manage their downloads in real time. User can pause, continue, move in queue, add new downloads and remove downloads manualy. User also can allow to remove completed or failed downloads automatically by the program.
- Recursive downloading via FTP as well as via HTTP is supported. Powerful Filters-manager allow advanced user to specify files which must to be downloaded and files which must to be skipped. Wildcards are supported for FTP downloads too.
- Ability to download in more than one connection per time. Usualy downloading using number of connections increases speed of downloading up to 300% and even more!
- Supporting of so called `Persistent connections increases speed of downloading due much less amount of `standing connection stages. With this feature D4X uses connections to the servers many times. Persistent connections over HTTP are supported automaticaly but persistent connections over FTP can be turned on by user (Do not send QUIT command option of FTP settings).
- Ability to limit download speed of separate file as well as for the whole program allows modem user browse through the Web and download files at the same time.
- Built-in Scheduller, URL-manager and Automatically adding allow advaced user to simplify managing downloads by various criterias.
- Multiqueued design, ability to run without X interface, ability to manage D4X via command line and many other features will satisfy anybody who find a time to learn this program.