Free Informix tutorials

Informix Unleashed

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Sample book on Informix.

Informix Backup and Recovery

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Sample chapter at Oreilly

International Informix Users Group

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All kinds of Informix information sources. The site appears to offer free registration.

Unofficial Informix FAQ

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Frequently Asked Questions about Informix

I*Teach

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Includes an Informix glossary and stuff to know about Informix.

IBM Informix Developer Zone

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IBM Informix center.

PHP and Informix

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Web Development, Dynamic Content and More.

Informix Forum

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Informix forum.