Here are snippets gathered from the mailing list, or other rough notes. Feel free to take this content and work it up into a more fully-fledged description of the functionality, a HOW-TO or Tutorial.
Configuring Portal to be used outside the samples Folder
Make An Internal Pipeline Too
Add internal-only="true" to map:pipeline element. The pipeline can then no longer be accessed externally, but can still be invoked using the Cocoon Protocol (see Protocols)
Custom generator in Python
Perform a Redirect
Minimal sitemap example
Using the cocoon:/ protocol to modularize pipelines and aggregate data from multiple sources
Compressing Output of Cocoon
Setting the output encoding
How to remove namespace declarations and prefixes?
Error handling in the authentication framework
Cocoon-Style Logging in Non-Cocoon Java Classes
Need to write log messages from a Java class in a Cocoon application, but your class doesn't extend a Cocoon or Avalon component? Here's how: JavaLogging.
Automatically Inserting Non-Blanking Spaces Into Empty Table Cells
Do you suffer from poorly formatted HTML tables caused by empty cells? Would you like to automatically insert a non-blanking space into all you table's empty cells? Here's an XSLT snippet that shows you how: HtmlTableCellNonBlanking.
Docbook Transformations using Norman Walsh's stylesheets
Do you want to use Docbook as the system to write important structured documents and you want to transform them to PDF or to HTML with the stylesheets already prepared and manteined by Norman Walsh? DocbookTransformation.
Sitemap Variable Substitution
Learn about the different ways of using SitemapVariableSubstitution inside the sitemap.
A little Example to get started with the LDAP
Selecting generator on extension
An example of how to find out a generator depending on the existence of a file with the given extension GeneratorOnExtension
XMLForms Repeat tag
Some of the more complex ways to use <xf:repeat> in XMLForms: XMLFormsRepeat.
Load Testing Flow With JMeter
An LoadTestingFlowWithJMeter JMeter script for testing flow with continuations.
Apache/Cocoon Virtual Hosting
An VirtualHost of how to serve several virtual hosted domains from a Apache/Tomcat server.
Convenience Bookmarklets for working with cocoon-view debugging
A GzipPipeline that supports Gzip compression
A ValidationTransformer that can be inserted in any stage of an XML pipeline, in order to validate its contents.
A FotoTransformer that can be useful for debugging any XML pipeline.
Simple Navigation Tree
A SimpleNavigationTree xml xslt Exapmle.