Apache Software License - Definition and Overview

The Apache Software License is an open source license used by the Apache Software Foundation. The Apache license (version 1.1) requires preservation of the copyright notice and disclaimer, but allows use and distribution of the source code in both open source and closed source software.

Selected programs released under this license

• Apache Ant - Java build tool
• Apache Axis - SOAP implementation
• Apache HTTP server and various of its modules
• Apache Xindice - database server
• AxKit - XML application server
• Jakarta Tomcat - Java servlet and JSP container
• JXTA - peer-to-peer framework
• SpamAssassin - spam mail filter
• Subversion - version control system
• Xalan - XSLT processor
• Xerces - XML parser

The Free Software Foundation considers all versions of the Apache License Free Software incompatible with the GNU General Public License as quoted here (http://www.gnu.org/licenses/license-list.html).

External links

• Official Apache Software License (2.0) (http://www.apache.org/licenses/LICENSE-2.0.html)
• GNU project license compatibility notes (http://www.gnu.org/philosophy/license-list.html)
• Apache License v2.0 and GPL Compatibilit (http://www.apache.org/licenses/GPL-compatibility.html)