UC Davis Campus This great site offers everything you will ever want to know about wine making.
Winepress.us This great site has an excellent forum.
Winemaking Magazine A great online site, featuring articles from their bi-monthly magazine.
The Winemakers Manual Written by Lum Eisenman, undoubtedly the most prolific poster in any forum.
Using SO2. The whole Story.. by Charles Plant
Free SO2 as a function of pH and molecular SO2. By Charles Plant
Lallemand Yeast Interesting site for those wishing to know more about this major supplier to the industry.
American Wine Society Devoted to educating people on all aspects of wine.
Sulphite Calculator This great tool is just what you need to calculate how much sulphite to adjust your free SO2.
CellarNotes. Nice site maintained by Dan Miller. Aimed more at the commercial end of the business, but packed with everything you would ever want to know about wine.
Free SO2 calculator This invaluable tool will make it much easier for you to adjust free SO2, thus ensuring proper aging.