The links listed here are all resources that I find useful and highly recommend.
Bear Flavored's Ultimate Guide To Hop Varieties / Hop Cheat Sheet
Detailed information about hops varieties and substitution guide
Detailed hops profiles and info for selected hops.
Brewing Recipe Calculation Tools
A nice software tool for designing beers, not free but free trial available
Another recipe calculator, this one is a free online one
This is the calculator I started with, great for recipes using hopped extract kits. It's an Excel spreadsheet application for designing kit and extract recipes. It has kit data that the usual brewing calculators don't have, but it is not for AG.
Home Brewing Forums
Australia based home brewing forum
Online Forum (Australia based)
Very active online forum (USA based)
UK based home brewing forum
New Zealand based online forum
Learning Resources for Home Brewing
Basic Brewing Radio and Basic Brewing Video - brewing videos and podcasts
Highly rated beginners home brewing book (online free book)
Internet radio shows about brewing
Instructions for specific tasks
Another good instructional video from billybrew.com
Best instructional video on yeast harvesting that I've come accross
Home Brewing Suppliers in New Zealand
Brewery and brewing supplies shop. Originally was called 'Liberty Brewing'.
Brewers World Whangarei is a family business, owned and operated by Brent Kallu and his wife Rebecca.
New Zealand online shop for home brewing supplies
Home brewing equipment and supplies in Upper Hutt connected with Te Aro Brewing Company. Originally started as 'All Grain Home Brewery Supplies' by Karl Hayes in Lower Hutt.
Home Brewing suppier based in Lower Hutt
Home brew supplier based on Palmerston North
Online brewing supplies store with two brick and mortar stores in Auckland.
Nelson based homebrew supplier, online shop.
Specialising in malt extract
Wellington based home brewing supplier
Home Brewing Bloggers
A must read brew blog by a homebrewer who does some worthwhile expereiments - very interesting!
A log of the homebrewing experiments Michael Tonsmeire, The Mad Fermentationist. Author of American Sour Beers. Flavor Developer for Modern Times Beer.