Recipe Calculator's
http://www.brewtoad.com/ (free)http://www.promash.com/ ($24.95)
http://www.beersmith.com/ ($21.95)
Water Chemistry Calculator's
http://www.brewersfriend.com/water-chemistry/
http://www.ezwatercalculator.com/
Brewhouse Efficiency Calculator
http://www.brewersfriend.com/brewhouse-efficiency/
Priming Sugar Calculator's
http://www.tastybrew.com/calculators/priming.html
http://www.brewblogger.net/index.php?page=tools§ion=sugar&action=entry
http://www.homebrewing.com/calculators/?page=tools§ion=sugar&action=entry
Brewing Education
http://www.abgbrew.com/
http://www.siebelinstitute.com/
http://extension.ucdavis.edu/unit/brewing/
Unique Resources
http://www.braukaiser.com/wiki/index.php?title=Main_Page
http://www.mrmalty.com/
http://www.brettanomycesproject.com/
Style Guidelines
http://www.bjcp.org/stylecenter.php
Useful Blog
http://www.themadfermentationist.com/
http://seanywonton.blogspot.com/
http://ryanbrews.blogspot.com/
http://freshbrewlog.blogspot.com/
http://appellationbeer.com/blog/
http://barclayperkins.blogspot.com/
Make your own Labels
http://www.beerlabelizer.com/
http://labeley.com/
Retail/Suppliers
http://www.northernbrewer.com/brewing
http://www.williamsbrewing.com/
http://www.midwestsupplies.com/
http://beergrains.com/