Free towards software for linux

Tk::Wizard::Installer is a Perl module for building-blocks for a software install wizard.

use Tk::Wizard::Installer 1.932;
my $wizard = new Tk::Wizard::Installer( -title => "Installer Test", );
$wizard->addDownloadPage(
-wait => undef,
#-on_error => sub { ... },
-no_retry => 1,
-files => {
http://www.cpan.org/ => ./cpan_index1.html,
http://www.cpan.org/ => ./cpan_index2.html,
http://www.leegoddard.net => ./author.html,
},
);
$wizard->addPage( sub {
return $wizard->blank_frame(
-title=>"Finished",
-subtitle => "Please press Finish to leave the Wizard.",
-text => ""
);
});
$wizard->Show;
MainLoop;

This module makes the first moves towards a Tk::Wizard extension to automate software installation, primarily for end-users, in the manner of Install Sheild.

If you are looking for a freeware software installer that is not dependant upon Perl, try Inno Setup - http://www.jrsoftware.org/. Its so good, even Microsoft have been caught using it.

Clabbers is an anagram tool aimed towards solving Scrabble racks. Clabbers project consists of a couple of Perl scripts, a word list, and an SQL schema.

It was designed for use with PostgreSQL, though it could be ported to other database backends.

Ara is an automatic editor of RSS feed. Only the links towards the Web pages must be given to him. The project is able to retrieve the title and the description of the pages and to produce a syndication file in the RSS format.

It enables you to select the pages to be syndicated instead of publishing the last articles systematically as the generators included in content managers do it.
The Ara term means "Atom and RSS API", it is also the name of a species of parrots from South America.

Using Ara

The program is a set of PHP scripts which have to be stored on a Web site. One creates a feed from the browser by entering the URL of the interface, ara.php.
It is easier to use the program with two browsers, one to display the pages to include and to copy the URLs from the URL input field, the other to edit the RSS file. Thus by just a cut and paste action one transfers the URL from the field to the interface and one clicks on "Add" to add it to the list.

The EDIT button on the left of the link makes it possible to modify the title and description if one wants.

To generate the feed, one enters the nam.

Warning
Ara is not a simple editor, when a page is added, it is reads for extracting useful information and for this purpose Ara makes use of Ajax (with the Anaa framework ), but Ajax can read files only from the site where it is installed. Actually the goal is to build the feed of the site, just avoid to give URL to other sites.

How it works

It is an Ajax script with a backend in PHP 5. In the current version only the pages of the website where it is installed can be added to the feed.

It is necessary to be authenticated to use it, to this goal the install.php program allows to register a login and a password. This file must absolutely be be erased. Once registered, the user remains registered for the whole session, even if he reads other pages meanwhile.

To generate the contents automatically, the program loads the pages given in the list and reads in the head section the contents of the title and description tags. If they are missing, the first H1 tag in the body of the page will be used for the title instead.

The same if description misses, the text of the synopsis will be taken from the page instead.

OpenGrade is software for teachers to keep track of grades. OpenGrade can put the students grade reports on a Web server and allow the students password-protected access to them.
Main features:
- A variety of reports can be created.
- Grades can be uploaded to a web server, where students can have password-protected access to them.
- If you use a set grading scale, you can have the software use it to compute letter grades automatically.
- Grades can be based on total points, or on a weighted average of scores in various categories such as exams and quizzes.
- You can drop the lowest grade (or the N lowest grades) from a given category.
- Students can be dropped and later reinstated without losing all their grades.
- There is support for extra-credit categories, and for categories that dont count towards the students grade.
- Gradebook files are password-protected with a digital watermark, so you can detect tampering.
- Gradebook files are in a plain-text format, which makes it easy to work with them using Unix utilities.
You might also want to check out Ggradebook and Grades, which are two other open-source programs along similar lines. There is a category for this kind of software on Open Directory.
OpenGrade is designed to cooperate with my software Spotter. By using the two pieces of software together, you can post grade reports on the web, keep track of your students e-mail addresses, and collect certain kinds of work from them online.
Enhancements:
- This version correctly recognizes Perl/Tk 804.027 as being compatible with itself, rather than insisting on 804.029 or higher.

TagFu is a library for tagging entities (which can be anything with a url) with Tags or metadata. The project is implemented in Python and very closely mimics basic Python data structures.

Tags is a Python list of tags, Entities is a Python List of Entity objects, and Entity is a dict which contains all the key-value pairs for all tags associated to the Entity. The key is the Tag name and value is an arbitrary value, if no value is set, the tag is considered to be a simple tag.

The current direction of development is towards a C port to make binding to other languages easier, and the development of applications to use TagFu.

ipfmeta is used to simplify the maintenance of an IPfilter ruleset. It does this through the use of objects. A matching object gets replaced by its values at runtime. ipfmeta is specifically geared towards IPfilter. It is line oriented: if an object has multiple values, the line with the object is duplicated and substituted for each value. It is also recursive: an object may have another object as a value.

ipfmeta is a program written in Perl.

Mantissa is a collection of various mathematical tools aimed towards for simulation.
Mantissa contains a collection of algorithms, among which:
a small set of linear algebra classes
a least squares estimator
some curve fitting classes
several ordinary differentials equations integrators, either with fixed steps or adaptive stepsize control (see below)
vectors and rotations in a three dimensional space
algebra-related classes like rational and double polynomials
various orthogonal polynomials:
Chebyshev
Hermite
Laguerre
Legendre
some random numbers and vectors generation classes:
Robert M. Ziff four tap shift register (contributed by Bill Maier)
Makoto Matsumoto and Takuji Nishimura Mersenne twister
generators for vectors with correlated components
some basic (min, max, mean, standard deviation) statistical analysis classes
some optimization algorithms using direct search methods:
the Nelder-Mead simplex method
Virginia Torczons multi-directional method
Enhancements:
- For many basic objects provided by Mantissa like Vector3D, Rotation, and the various Polynomial classes, instances are now guaranteed to be immutable.
- This greatly simplifies safe sharing of instances without forcing users to either put severe restrictions on their use of Mantissa classes or make numerous copies just to make sure everything is safe.
- Since the change is a semantic change on the contract of the classes, this version introduces some incompatibilities with respect to previous ones.
- Upgrading to this version is not difficult, though.