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OPEN-SOURCE SOFTWARE is computer software that is available for use at no cost.  Many of these freeware titles provide equal service and quality as many of the name brand software pages that you buy.  While Irving ISD students may not be able to install additional software on their district issued laptops, these programs are great to use on home computers or classroom desktops.

Free Installers

Video Conversion & YouTube Applications


DVDVideoSoft is an independent developer of multimedia software programs for video, audio, photo and image processing. The company offers 40+ safe, reliable and functional applications to download videos from YouTube and convert to mp3, upload to YouTube and Facebook, edit and convert audio and video files between different formats, burn CD, DVD discs, create DVDs, convert DVDs to video files, convert and resize images, record screen activities and make screenshots, convert video to playback on different devices, make 3D pictures and videos.



OpenOffice is the leading open-source office software suite for word processing, spreadsheets, presentations, graphics, databases and more. It is available in many languages and works on all common computers. It stores all your data in an international open standard format and can also read and write files from other common office software packages. It can be downloaded and used completely free of charge for any purpose.

For tutorials & guides for OpenOffice see:



LibreOffice is the free power-packed Open Source personal productivity suite for Windows, Macintosh and Linux, that gives you six feature-rich applications for all your document production and data processing needs: Writer, Calc, Impress, Draw, Math and Base.  Support and documentation is free from our large, dedicated community of users, contributors and developers.



Celestia lets you view the night skies from any point on earth at any time or virtually fly through space to see the sky from any point in the known universe.



Stellarium is a free open source planetarium for your computer. It shows a realistic sky in 3D, just like what you see with the naked eye, binoculars or a telescope. It is being used in planetarium projectors. Just set your coordinates and go.



KStars is a Desktop Planetarium for KDE. It provides an accurate graphical simulation of the night sky, from any location on Earth, at any date and time. The display includes up to 100 million stars, 13,000 deep-sky objects, all 8 planets, the Sun and Moon, and thousands of comets and asteroids.



Kalzium is an application which will show you some information about the periodic system of the elements. Therefore you could use it as an information database.  Kalzium has already some nice features but there are still a lot of things to do. As Kalzium has been included in KDE 3.1 we are currently coding quite lot to bring in some new and nice features and make it as fast and usefull as possible. You can help us by testing it or make proposals for new features or a better design.


Google Earth

Google Earth lets you fly anywhere on Earth to view satellite imagery, maps, terrain, 3D buildings, from galaxies in outer space to the canyons of the ocean. You can explore rich geographical content, save your toured places, and share with others



The original .Net version of WorldWind offers very similar functionality as Google Earth. Now you can also download a Java SDK for WorldWind that lets you create your own apps based on the technology. For educators who aren't interested in writing their own apps, the site also includes links to Web applications that other people have created with WorldWind, including ones that track earthquakes and global warming.



This world globe app offers special features for classroom teachers, like topographic maps, map keys, temperature and precipitation maps, and more. You can even change the date and time and watch how the sky and twilight zone on the map changes.



GraphCalc does everything a handheld graphing calculator would do, and it's easy to use. As the Web site says, "GraphCalc can be your first, last, and only line of offense against the mathematics that threaten to push you over the brink of insanity. It slices, dices, shreds and purees functions that leave other calculators wondering what hit them."



This command-line tool creates both 2D and 3D graphs from mathematical functions. Because it doesn't have a GUI, it's not as easy to use as most of the other graphing apps, but it does have extensive help available on the Web site.



This calculator doesn't graph, but it does perform a multitude of scientific operations using very large numbers. Unlike the Scientific Advantage product, it doesn't keep track of units, however.



Calling itself "a computer algebra system," Maxima graphs in 2D and 3D and performs differentiation, integration, Taylor series, Laplace transforms, ordinary differential equations, systems of linear equations, polynomials, and sets, lists, vectors, matrices, and tensors. It offers a barebones graphic interface, or you can run it in command line mode.



Developed by a music student, this app helps users learn music theory concepts and improve their ear. It also includes a basic score editor for composition students.


GNU Solfege

Want to improve your musical ear? Like Earmaster, GNU Solfege offers a number of exercises that teach students to identify and sing intervals, recognize rhythms patterns, sing scales and chords, and identify harmonic progressions.



Designed for elementary students who are learning their way around the keyboard, TuxType offers basic typing lessons and two fun typing games. This app doesn't offer quite as many games, lessons, and features as the commercial software, but it does provide a good introduction to typing for young students.



Unlike many other typing programs, Klavaro makes it easy to learn to type on international and other non-standard keyboard layouts in addition to the standard QWERTY keyboard. This app includes progress tracking and a contest that can run on a local network, but it lacks some of the fun games of other apps.


TypeFaster Typing Tutor

The interface on TypeFaster is pretty basic, but it gets the job done. Like Klavaro, TypeFaster supports multiple keyboards and languages, and it offers a "multi-user with teacher support" version that lets teachers specify which lessons students should work on each day.

Photo Editing


Paint.NET is free image and photo editing software for computers that run Windows. It features an intuitive and innovative user interface with support for layers, unlimited undo, special effects, and a wide variety of useful and powerful tools. An active and growing online community provides friendly help, tutorials, and plugins.



GIMP is a multi-platform photo manipulation tool. GIMP is an acronym for GNU Image Manipulation Program. The GIMP is suitable for a variety of image manipulation tasks, including photo retouching, image composition, and image construction.

GIMP has many capabilities. It can be used as a simple paint program, an expert quality photo retouching program, an online batch processing system, a mass production image renderer, an image format converter, etc.

Audio Editing


Audacity is a free, easy-to-use audio editor and recorder for Windows, Mac OS X, GNU/Linux and other operating systems. You can use Audacity to:

  Record live audio

  Convert tapes and records into digital recordings or CDs

  Edit Ogg Vorbis, MP3, WAV or AIFF sound files

  Cut, copy, splice or mix sounds together

  Change the speed or pitch of a recording

Video Editing


Avidemux is a free video editor designed for simple cutting, filtering and encoding tasks. It supports many file types, including AVI, DVD compatible MPEG files, MP4 and ASF, using a variety of codecs. Tasks can be automated using projects, job queue and powerful scripting capabilities.


MPEG Streamclip

You can use MPEG Streamclip to open and play most movie formats including MPEG files or transport streams; edit them with Cut, Copy, Paste, and Trim; set In/Out points and convert them into muxed or demuxed files, or export them to QuickTime, AVI, DV and MPEG-4 files with more than professional quality, so you can easily import them in a DVD authoring tool, and use them with many other applications or devices.

Website Authoring


Nvu (pronounced N-view, for a "new view") is a complete Web Authoring System that combines web file management and easy-to-use WYSIWYG (What You See Is What You Get) web page editing. Nvu is designed to be extremely easy to use, making it ideal for non-technical computer users who want to create an attractive, professional-looking web site without needing to know HTML or web coding.

PDF File Creator

CutePDF Writer

PDF (Portable Document Format) is the de facto standard for the secure and reliable distribution and exchange of electronic documents and forms around the world.  CutePDF Writer is the free version of commercial PDF creation software. 

CutePDF Writer installs itself as a "printer subsystem". This enables virtually any Windows applications to create professional quality PDF documents - with just a push of a button!

DVD Authoring Tool

DVD Flick

DVD Flick aims to be a simple but at the same time powerful DVD Authoring tool. It can take a number of video files stored on your computer and turn them into a DVD that will play back on your DVD player, Media Center or Home Cinema Set. You can add additional custom audio tracks, subtitles as well as a menu for easier navigation.