Noah light is definitly one of the best free ones. However, if you want somthing that really suports one of the expansion cards, ie keeping the dictionary on the card (MMC/SD, Memory Stick), You really need to pay some money for somthing good. Noah Pro is nice for this, as is the new version of PalmReader Pro. For $10 you get a very nice e-book reader, with a built in dictionary. True, the one that comes with it is rather limited, but you can update it to the huge 165,000 websters dictionary (10MB :Q ) Not info you might need, but I just thought I'd mention it.