We have recently converted SPIDER to an GPL Licensed Open Source distribution and it is now available for free download.
If the download fails, you may contact us directly at (email: spider@wadsworth.org) for alternative information on how to obtain SPIDER. You should also view the SPIDER/WEB documentation which is accessible through the Wadsworth Lab's home page http://www.wadsworth.org/spider_doc
We are continuing active development and support of SPIDER. We will continue to provide support under current SPIDER maintenance agreements. Send us your questions.
We are continuing development and support of SPIDER. All future updates of SPIDER and support for SPIDER will be freely available under our new GPL Licensed "Open Source" distribution model.