A collaborative project like this doesn't exist in a vacuum. In order to keep project like this running, you need support and help. The xml.apache.org project has been fortunate to have the support of the following:
The Apache Software Foundation
The xml.apache.org project operates as an Official Project under the Apache umbrella. It abides by the same principles and operating procedures as the parent organization.
IBM provided the initial code base for Xerces (Java, C++, Perl and COM versions), as well as ongoing support for this and other Apache projects (e.g. the Apache HTTP server).
Lotus provided the initial code base for Xalan (Java and C++ versions).
Exoffice has contributed their OpenXML and XSL:P technologies.
DataChannel has contributed their XPages technologies.
Sun Microsystems, Inc.
Sun has contributed their ProjectX and XHTML parser technologies.
And, of course, with the support of contributors like you. While a variety of corporations above provide logistical as well as code contributions, Apache also relies on the thousands of individual developers worldwide who donate their time and energy reporting bugs, helping out on our mailing lists, submitting code patches, writing documentation, releasing builds, and all the other tasks that go into keeping a community-based technical project going strong.