Acknowledgements

Apache ANT
Quokka naturally owes a lot to ANT, using ANT as the host environment and ANT's tasks extensively throughout

Ant-Contrib
Quokka bundles the if, for, run-target, var and switch tasks from Ant-Contrib

Xwork2
PropertiesReader was sourced from xwork2, which in turn sourced it from Apache Commons Config and Commons Lang

Apache Commons Lang
StringUtils (renamed to Strings) was sourced from Commons Lang

Studio 7 Designs
The web site template is based on a customised version of Studio 7 Designs Nautica 05 template
Maven

Although Quokka is intended as a replacement to Maven, Quokka has taken some of the good ideas from Maven, such as archetypes and the concept of an abstract life cycle.

Plugins are generally a thin wrapper over existing ANT task or 3rd part libraries. See the particular plugin documentation for more information.