| 1. | Dow's Port | | | Founded in 1798, and 100% family-owned. One of the great names in Port. www.dows-port.com |
| 2. | Graham's Port | | | Universally acknowledged to be a leader in the field of Vintage Port. www.grahams-port.com |
| 4. | Fonseca Guimaraens | | | One of the most famous Port houses. Site is also available in French and Portuguese. www.fonseca.pt |
| 6. | 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. www.quintadonoval.com |
| 7. | 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. www.quintadoportal.com |
| 8. | 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. www.jmf.pt |
| 9. | Quinta de la Rosa | | | Small family-owned vineyard producing Ports, wines and olive oils. Also offers accommodations on the estate www.quintadelarosa.com |
| 11. | Rozès Porto | | | Includes a profile of this Port producer, along with descriptions of wines, a list of distributors, and a few recipes. www.rozes.pt |
| 12. | Quinta de Roriz | | | Makers of Port and Douro table wines. Contains information about products, vineyards, history, and distributors. www.quintaderoriz.com |
| 13. | Kopke Ports | | | Port producer and exporter. Includes a company history and product descriptions. www.kopkeports.com |
| 14. | 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] www.casadainsua.pt |
| 15. | 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] www.quintadelemos.com |
| 16. | 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] www.carm.pt |
| 17. | G Porto | | | Gilbert's line aimed at young adults. Includes product descriptions, cocktail recipes, and an award list. [Flash Required] www.gporto.com |
| 18. | 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] www.ramospinto.pt |
| 19. | Quinta do Tedo | | | A single quinta Port producer in the Alto Douro region. Features product descriptions, reviews, an award list, a newsletter, and a company overview. www.quintadotedo.com |
| 20. | 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] www.croftport.com |
| 21. | 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. www.calem.pt |
| 23. | Real Companhia Velha | | | One of the leading producers of Port and the largest owner of the premium land in the Douro Valley. www.realcompanhiavelha.pt |
| 24. | Smith Woodhouse Port | | | Founded in 1784, Smith Woodhouse has consistently been judged as one of the finest of all Vintage Port producers. www.smithwoodhouse.com |
| 25. | Vallegre | | | Wines from Quinta da Vista Alegre's vineyards of the Douro Valley. www.vallegre.pt |
| | |