Audacity

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.
* And more! See the complete list of features.


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Gimp

The GIMP is a multiplatform 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.

It 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.

GIMP is expandable and extensible. It is designed to be augmented with plug-ins and extensions to do just about anything. The advanced scripting interface allows everything from the simplest task to the most complex image manipulation procedures to be easily scripted.

Note that, if this is the first time you're installing The GIMP, you will also need GTK+ 2 Runtime Environment from here. Note that the Gimp help files are also available from the same place.

This is only a brief list of GIMP features:

• Full suite of painting tools including brushes, a pencil, an airbrush, cloning, etc.
• Tile-based memory management so image size is limited only by available disk space
• Sub-pixel sampling for all paint tools for high-quality anti-aliasing
• Full Alpha channel support
• Layers and channels
• A procedural database for calling internal GIMP functions from external programs, such as Script-Fu
• Advanced scripting capabilities
• Multiple undo/redo (limited only by disk space)
• Transformation tools including rotate, scale, shear and flip
• File formats supported include GIF, JPEG, PNG, XPM, TIFF, TGA, MPEG, PS, PDF, PCX, BMP and many others
• Selection tools including rectangle, ellipse, free, fuzzy, bezier and intelligent
• Plug-ins that allow for the easy addition of new file formats and new effect filters

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Stellarium

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.

OpenOffice.org 2.4.0 RC2

OpenOffice.org is an open-source, multiplatform and multilingual office suite comparable with MS Office.

It is compatible with all other major office suites and is free to download, use, and distribute. It was previously known as StarOffice before it became an open-source project. OpenOffice comes with OpenWriter - a word processor, OpenCalc - a spreadsheet and OpenImpress - a presentational package.

• The first office suite to use the new OASIS OpenDocument format, the future-proof international standard for office software
• Easy to install, with a whole new look and feel, matched to the type of computer in use
• More intuitive, more easy to use than ever, with a host of new usability features
• Complete with Base: an easy-to-use database manager with a fully integrated database
• Compatible with other software packages - now understands even obscure and rarely used features in major competitors.

You may download OpenOffice.org Version 2 completely free of any licence fees, use it for any purpose - private, educational, government and public administration, commercial - and pass on copies free of charge to family, friends, students, employees, etc.

Versions for different platforms are available from OpenOffice.org.