Free especially useful software for linux

Scintilla is a free source code editing component. Scintilla comes with complete source code and a license that permits use in any free project or commercial product.

As well as features found in standard text editing components, Scintilla includes features especially useful when editing and debugging source code. These include support for syntax styling, error indicators, code completion and call tips.

The selection margin can contain markers like those used in debuggers to indicate breakpoints and the current line. Styling choices are more open than with many editors, allowing the use of proportional fonts, bold and italics, multiple foreground and background colours and multiple fonts.

The SinkWorld project investigates possible future directions for Scintilla to make it more flexible, robust, perform better and run on the .NET and Java virtual machines.

Development of Scintilla started as an effort to improve the text editor in PythonWin. After being frustrated by problems in the Richedit control used by PythonWin, it looked like the best way forward was to write a new edit control.

The biggest problem with Richedit and other similar controls is that they treat styling changes as important persistent changes to the document so they are saved into the undo stack and set the documents dirty flag. For source code, styling should not be persisted as it can be mechanically recreated.

Scintilla and SciTE are currently available for Intel Win32 and Linux compatible operating systems with GTK+.

Tree::Binary is a Object Oriented Binary Tree for Perl.

SYNOPSIS

use Tree::Binary;

# a tree representaion of the expression:
# ((2 + 2) * (4 + 5))
my $btree = Tree::Binary->new("*")
->setLeft(
Tree::Binary->new("+")
->setLeft(Tree::Binary->new("2"))
->setRight(Tree::Binary->new("2"))
)
->setRight(
Tree::Binary->new("+")
->setLeft(Tree::Binary->new("4"))
->setRight(Tree::Binary->new("5"))
);
# Or shown visually:
# +---(*)---+
# | |
# +-(+)-+ +-(+)-+
# | | | |
# (2) (2) (4) (5)

# get a InOrder visitor
my $visitor = Tree::Binary::Visitor::InOrderTraversal->new();
$btree->accept($visitor);

# print the expression in infix order
print $visitor->getAccumulation(); # prints "2 + 2 * 4 + 5"

# get a PreOrder visitor
my $visitor = Tree::Binary::Visitor::PreOrderTraversal->new();
$btree->accept($visitor);

# print the expression in prefix order
print $visitor->getAccumulation(); # prints "* + 2 2 + 4 5"

# get a PostOrder visitor
my $visitor = Tree::Binary::Visitor::PostOrderTraversal->new();
$btree->accept($visitor);

# print the expression in postfix order
print $visitor->getAccumulation(); # prints "2 2 + 4 5 + *"

# get a Breadth First visitor
my $visitor = Tree::Binary::Visitor::BreadthFirstTraversal->new();
$btree->accept($visitor);

# print the expression in breadth first order
print $visitor->getAccumulation(); # prints "* + + 2 2 4 5"

# be sure to clean up all circular references
$btree->DESTROY();

This module is a fully object oriented implementation of a binary tree. Binary trees are a specialized type of tree which has only two possible branches, a left branch and a right branch. While it is possible to use an n-ary tree, like Tree::Simple, to fill most of your binary tree needs, a true binary tree object is just easier to mantain and use.

Binary Tree objects are especially useful (to me anyway) when building parse trees of things like mathematical or boolean expressions. They can also be used in games for such things as descisions trees. Binary trees are a well studied data structure and there is a wealth of information on the web about them.

This module uses exceptions and a minimal Design By Contract style. All method arguments are required unless specified in the documentation, if a required argument is not defined an exception will usually be thrown. Many arguments are also required to be of a specific type, for instance the $tree argument to both the setLeft and setRight methods, must be a Tree::Binary object or an object derived from Tree::Binary, otherwise an exception is thrown. This may seems harsh to some, but this allows me to have the confidence that my code works as I intend, and for you to enjoy the same level of confidence when using this module. Note however that this module does not use any Exception or Error module, the exceptions are just strings thrown with die.

This object uses a number of methods copied from another module of mine, Tree::Simple. Users of that module will find many similar methods and behaviors. However, it did not make sense for Tree::Binary to be derived from Tree::Simple, as there are a number of methods in Tree::Simple that just wouldnt make sense in Tree::Binary. So, while I normally do not approve of cut-and-paste code reuse, it was what made the most sense in this case.

Project Dune provides an issue tracker integrated with source code control systems.
Project Dune is a Web-based issue tracker that is fully integrated with source code control systems, which enables code inspections in the browser.
The project aims to automate the full cycle of development, from estimation to release.
This allows more time for productive tasks like architecture, design and coding. Especially if you have a quality plan in place based on ISO or CMM, you will find this software useful.
It is built for Tomcat with GWT, Hibernate, Java, Dozer, using the Postgres database.
Enhancements:
- An entire new layout.
- An administration module has been added.
- The inspection m- Eodule has been separated, and binary inspections added.
- Many fixes and features have been implemented.

Pixane is a library for image handling and transformation. The library supports a large number of formats in both reading and writing modes.
Pixane has been designed to be used from a dynamic language like Tcl. It makes possible and easy to generate and transform images in scripts, and is especially useful for web developers, since it can be called as CGI.
See pixane and pixfont for reference on how to use Pixane from Tcl scripts.
Pixane standalone distribution is made of dynamic libraries with no external dependencies. It requires no installation at all, except copying the correct dynamic library for your platform anywhere and loading it into your Tcl interpreter. All shared libraries are libc agnostic as much as possible. Especially on Linux platform, all libraries should be loadable in either a uClibc or glibc based interpreter, or in tclkit.
Pixane is also part of ETcl distribution, making it easy to deploy on a large variety of platforms, including Win32, Linux and Windows Mobile 2003 (aka PocketPC).
Enhancements:
- Dfont support on Mac OS X was added.
- A bug with reading multi-frame GIF images with local palettes was fixed.
- A larger set of compositing operators was implemented.

The QDS library allows Qt applications to access features provided in common desktop APIs in a portable way, without requiring dependencies on any desktop platform library.
This is especially useful for applications targeting the Unix desktops, because Qt/X11 is very generic and only provides features it can implement on all sub platforms. All library code is licenced under 2-clause BSD licence.
Service implementations are loaded from plugins which link to the respective desktop libraries. The plugin to use can be specified on the applications commandline, in the QDS configuration file or QDS can try to autodetect the currently running platform.
Enhancements:
- Autodetection to use GNOME plugin in case GNOME_DESKTOP_SESSION_ID is set
- Replaced the primitive example application with a simple but network aware text editor application
- Support for wildcards in mailcap entries

KCatalog project is an Multimedia catalog utility which allows you to organize huge collection of Movie/MP3 files in your hard disks,CDs,DVDs or any other media.
You can explore your multimedia collection easily and find the file you wish in just a few seconds. KCatalog provides extensive support to organize MP3 collection.
A very useful application for serious music lovers...
Main features:
- View MP3 information grouping it by albums, artists, genres, file location or your comments
- View movie information by file location or your comments
- Keep track of your Mp3/Movie CDs or DVDs by saving information like who borrowed it from you, notes regarding the CD/DVD etc
- Create and Manage M3U Playlists
- Sort your files by many different categories like artist, album, genre, title, file Location and your own comments.
- Facility to handle changes in drive letter or changes in Mount Location which is especially useful in linux platforms where the removable storage mount location may change or when you plug your harddisk in some other machine causing your drive letters to change
- Use your favourite application to play music or movie
- Catalog your MP3/Movie CDs, DVDs and other removable storage mediums based on the comments you give
- Efficient pattern matching to search for MP3 Files using file names, file location, ID3 tags (artist, album, genre, title) or your own comments.
- Search facility with advanced pattern matching options
- Database Backup/Recover Mechanism which ensures that your database will not be lost
- Supports both Linux and Windows platforms
- Pluggable Look & Feel
- And more over its Open source

QuickReinstaller is a small product that adds a "reinstall product" link to the add/remove products page.
QuickReinstaller is a product that adds a "reinstall product" link to the add/remove products page to cut down on unnecessary page loads/refreshes; especially useful to those of us who have sluggish computers.
Currently targeted to Plone 2.5.x. QuickReinstaller links will only display when Zope is running in Debug or Foreground mode.
Installation
1. Place QuickReinstaller in the Products directory of your Zope instance.
2. Restart the server.
3. Go to the Site Setup page in the Plone interface and click on the Add/Remove Products link.
4. Choose QuickReinstaller (check its checkbox) and click the Install button.
You may have to empty your browser cache to see the effects of the product installation/uninstallation.
Uninstall -- This can be done from the same management screen.
Enhancements:
- Adds basic reinstall functionality.

QPVCalendarWidget is an extremely useful widget. With dependancy only on Qt4 no other libraries are needed inorder to use this widget; no depenancies means totally crossplatform for you the developer.

Unlike other Mini-Calendar widgets seen in Qt software such as the clock widget in the KDE Desktop, QPVCalendarWidget does not depend and never will on external libraries such as kdelibs which is hard to keep cross-platform especially when developing for Win32.

QPVCalendarWidget depends only on Qt4.

The goal of this project is to allow you to have a mini calendar for allowing users to select dates. Originating from PracticeVisions own need of a mini calendar LimeSG has opensourced this part of PracticeVision so you to can enjoy the ease of a simple calendar/graphical date selector in your application. Since Trolltech only supplies text based widgets for date, QPVCalendarWidget is the perfect solution for graphical date selection.