DMPTool provides a list of funder requirements and templates along with some sample plans. You can log in to the resource using your AU username and password to use it to build a data management plan.
ICPSR, the Inter-university Consortium for Political and Social Research, provides Data Management Plan Resources and Examples, including some from the natural sciences.
DataONE (the Data Observation Network for Earth) provides some sample plans developed during a best practices workshop.