Well, that depends on the site. Once again, I only link to the best of the best resources. Some of them are absolutely free. Others offer subscription-based services. Some have associated surcharges for the services that they provide. The prices are bound to vary greatly. It will be up to you, ultimately, to decide on which websites are worth their associated prices (if they have one). I offer a whole list, for instance, of language learning tools. Some of these services, naturally, offer premium subscriptions. I mean, hey, learning a language is never free (unless, of course, you simply immerse yourself in a foreign city and converse until you catch on). At the end of the day, though, once you become accustomed to TravelSites, I am completely confident that, even with certain services having various prices attached to them, you will end up being able to save money here. That is part of why I do this, to begin with! Because I want to make it as easy as possible for you to search for the best rates available. I want to make traveling as simple and affordable as it can be.