Engineering

The Internet Guide to Engineering, Mathematics and Computing - A very comprehensive and free website of engineering resources. Searchable by keyword or can be browsed by subject type. Also contains helpful links e.g. to teaching and learning - sites with descriptions on the assembly process for a car, how gears work etc.

How stuff works

Infomine Physical Science, Engineering, Computing and Maths

Farming

Enzed Farming in New Zealand - This site provides a series of links to NZ sites on a range of subjects - beef, dairy, deer farming, forestry, wines, horse racing industry, bee keeping and organic farming.

Natural resources

State of the Environment Report - A report produced by the Taranaki Regional Council.

Weather

Taranaki Rainfall - This Taranaki Regional Council site maps the current rainfall situation at 12 sites across the Taranaki region.

New Zealand MetService - Check out the Knowledge Centre with articles on weather topics and a selection of climate data for New Zealand.
The Weather Channel - While this initially looks to be a U.S. based site it actually includes a great deal of information on world wide weather and useful educational pages aimed at children and teachers.