http://www.scribus.net/
Scribus is an open-source program that brings award-winning professional page layout to Linux/Unix, MacOS X and Windows desktops with a combination of "press-ready" output and new approaches to page layout.

Underneath the modern and user friendly interface, Scribus supports professional publishing features, such as CMYK color, separations, ICC color management and versatile PDF creation.

http://www.spiceworks.com/
You want IT management software that works for you, not software that makes you work. You wish managing your network could be as simple as, say, managing your digital music. You are who we're looking for.
http://www.inspiration.com/
Leader in visual learning
Inspiration Software®, Inc. is recognized as the leader in visual thinking and learning. We develop and publish innovative software tools that inspire learners of all ages to brainstorm, organize, plan and create. With more than 15 million users worldwide, our award-winning software is revolutionizing visual learning in education—inspiring students to develop strong thinking and organizational skills and improve their academic performance.
http://www.stellarium.org/
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.
http://www.openoffice.org/
OpenOffice.org is a multiplatform and multilingual office suite and an open-source project. Compatible with all other major office suites, the product is free to download, use, and distribute. To help build the community, join us.
http://www.bittorrent.com/
BitTorrent is a peer-assisted, digital content delivery platform that provides the fastest, most efficient means of distributing, discovering, and consuming large, high-quality files on the Web. Our mission is simple: to deliver the content that entertains and informs the digital world.
DIA
Welcome to Dia's homepage. Dia is a gtk+ based diagram creation program released under the GPL license.

Dia is inspired by the commercial Windows program 'Visio', though more geared towards informal diagrams for casual use. It can be used to draw many different kinds of diagrams. It currently has special objects to help draw entity relationship diagrams, UML diagrams, flowcharts, network diagrams, and many other diagrams. It is also possible to add support for new shapes by writing simple XML files, using a subset of SVG to draw the shape.

It can load and save diagrams to a custom XML format (gzipped by default, to save space), can export diagrams to a number of formats, including EPS, SVG, XFIG, WMF and PNG, and can print diagrams (including ones that span multiple pages).

http://www.schoolforge.net/
The Purpose of Schoolforge
Schoolforge's mission is to unify independent organizations that advocate, use, and develop open resources for primary and secondary education. Schoolforge is intended to empower member organizations to make open educational resources more effective, efficient, and ubiquitous by enhancing communication, sharing resources, and increasing the transparency of development. Schoolforge members advocate the use of open source and free software, open texts and lessons, and open curricula for the advancement of education and the betterment of humankind.
http://www.schooltool.org
SchoolBell is a free, open source web application to allow groups and organizations to coordinate the sharing of calendars.
http://plone.org/

Plone has been around for over five years, and the nonprofit, community-governed Plone Foundation owns and protects all intellectual property and trademarks. Plone also has legal backing from the experts at Software Freedom Law Center.

http://www.opensourcecms.com/

This site was created with one goal in mind. To give you the opportunity to "try out" some of the best php/mysql based free and open source software systems in the world. You are welcome to be the administrator of any CMS system here, allowing you to decide which system best suits your needs. You should also visit CMS Training Videos for more in depth video tutorials for many of these systems.

http://www.opensourcewindows.org/

Free and open-source software is good for you and for the world. This is the best Windows software that we know of.
No adware, no spyware, just good software.

Open Souce Alternatives

Find open source software alternatives to well-known commercial software.