Chaturbate.com does not even require a credit card but this is a harder cam site to get true intimate 1-to-1 attention from cam girls for free. The thing about this supposedly totally free adult cam site is that you have a grey username if you have not paid for a credits package. This places you at a major disadvantage if you are after free sex cam shows because the cam girls can already tell you are a cheap ass.
As far as totally free adult webcams StripChat is also a rather cool new sex webcams chat site (Screenshot below)
While they too do not really offer free adult webcams, much like the two options above you can inadvertently get free sex cams by just acting like you plan to buy a show from a model and seeing what they is willing to do for you. StripChat.com suffers the same flaw as Chaturbate though in that models can see what you have spent with other cam girls and are less apt to give you free adult cam chat for more than a minute or 2 unless you have a strong reputation of being a regular tipper.
Unlike cam sites that blatantly lie about offering totally free adult webcams, we will just come right out and tell you that getting real free sex cams involves tweaking the rules because there is such a demand for adult webcams and because it is a profitable business for the models involved as well as the cam sites that offer the platforms.