| Adriano Ramos Pinto, S.A.: Produces Ports, dry reds, and brandy. Contains descriptions of the products, the vineyards, their museums, and the company. [Flash Required] |
| Bacalhoa: Produces red, white, sparkling, and fortified wines. Includes product descriptions and directions to the winery. Additional information is available in Portuguese. |
| Calem: Founded more than 140 years ago, the House of Calem owns grape vineyards and ageing cellars, and produces a wide range of Ports for a number of markets. |
| CARM - Casa Agrícola Roboredo Madeira, Lda.: Produces a range of wines from organic grapes in the Douro region. Includes product information and a company overview. Also produces estate olive oils. [Flash required] |
| Casa da Ínsua: Dão producer of reds and a white. Includes descriptions and pictures of the manor and its gardens. Also contains product information and a property history. [Flash required] |
| Cavipor: Produces still, sparkling, and fortified wines from the major regions under several brand names. Includes a portfolio, a company profile, and news. [Flash required.] |
| Cortes de Cima: Located in the Alentejo region in southeast Portugal. Harvest report and ordering information. |
| Croft Port: Port house founded in 1678. Presents its history, products, vineyards, how port is made, the types of port, and a glossary. [Flash required] |
| Dão Sul - Sociedade Vitivinicola, S.A.: One of the new wine producers that have been revitalising the Dão region. Specializes in Quinta. |
| Dow's Port: Founded in 1798, and 100% family-owned. One of the great names in Port. |
| Fonseca Guimaraens: One of the most famous Port houses. Site is also available in French and Portuguese. |
| G Porto: Gilbert's line aimed at young adults. Includes product descriptions, cocktail recipes, and an award list. [Flash Required] |
| Graham's Port: Universally acknowledged to be a leader in the field of Vintage Port. |
| José Maria da Fonseca: One of the oldest producers of Portuguese table wines and Setubal dessert wines. Markets under several other brand names, including Lancer's. |
| Kopke Ports: Port producer and exporter. Includes a company history and product descriptions. |
| Porto Barros: Founded in 1913, this producer specializes in old tawnies, also producing Douro table wines and brandy. Includes product descriptions, a company history, and vineyard information. |
| Quinta de la Rosa: Small family-owned vineyard producing Ports, wines and olive oils. Also offers accommodations on the estate |
| Quinta de Lemos: Producer in the Dão region, whose first harvest was in 2000. Includes descriptions of grape varieties, a regional history, and a view of the vineyards. [Flash required] |
| Quinta de Roriz: Makers of Port and Douro table wines. Contains information about products, vineyards, history, and distributors. |
| Quinta do Noval: Douro based, renowned producer of vintage Port, particularly its Nacional. Site offers information on the vineyards, the winemaking technique and the wines. |
| Quinta do Portal: A family-run winemaking company based in the Douro Valley in northern Portugal. Information on its white and red wines as well as a range of Ports. |
| Real Companhia Velha: One of the leading producers of Port and the largest owner of the premium land in the Douro Valley. |
| Rozès Porto: Includes a profile of this Port producer, along with descriptions of wines, a list of distributors, and a few recipes. |
| Smith Woodhouse Port: Founded in 1784, Smith Woodhouse has consistently been judged as one of the finest of all Vintage Port producers. |
| Sogrape: Produces table and fortified wines, under numerous brand names, including Mateus, Offley, and Sandeman. Includes a company profile, along with information about the vinyards and brands. [Flash required] |
| Symington Port and Madeira Shippers: Owns Warre, Dow, Graham, Smith Woodhouse, Gould Campbell, Quinta do Vesuvio and the Madeira Wine Company. |
| Taylor, Fladgate and Yeatman: One of the oldest and most famous Port houses. Site also available in French and Portuguese. |
| The House of Sandeman: Specializing in Port and Sherry for more than two hundred years. |
| Vallegre: Wines from Quinta da Vista Alegre's vineyards of the Douro Valley. |