There are thousands of freely available software programs waiting for you to download and try out. Here are two links where you can learn about and download software that interests you. There is no cost to you and you can share with anyone you wish.
Open Source Living: Archive of Open Source Sofware
Open Source Victoria Catalog of Free & Open Sofware for Education
If you want to learn more about thin-client solutions (creating a network of workstations running of one server), you need to check out the open source server software distributions K12LTSP and Edubuntu. Using older computers and free operating software for your school thin-client environment can save your school thousands of dollars.
We know that you will be satisfied with the quality and service which usually are provided without cost. Free and Open Source Software (FOSS) is licensed under the GNU GPL license.