From Pinot Gris to Pinot Noir, Cabinet Sauvignon to Sauvignon Blanc, the world of wines is vast and creating your own wine can be complex, although it doesn't have to be. Below are some websites that both beginner and advanced winemakers may find helpful.
Wine Maker is a magazine for wine makers. Whilst you need to purchase the magazine there are plenty of articles, blogs, and guides that are available for free. There is a lot of excellent information here for both beginner and advanced wine makers alike.
Wine Making Talk is an online forum for wine makers. The forum contains a lot of information for beginner and advanced wine makers and is a great place to ask questions.
TechniquesInHomeWinemaking.com and the book of the same name is written by Daniel Pambianchi, a seasoned amateur and professional wine maker. The website provides winemakers with a lot of information ranging from the basics through complex technical articles.