Yes, they all will work and it is the standard. But the problem is whether you can get the CI with CAM to work.

DVB-C (C=Cable), DVB-S(Satellite) and DVB-T(Terrestrial/local such as aerial)

I myself am using a TechnoTrend DVB-C 2.1 Premium with no CI upgrade. I am on UK Telewest and it gives me only those unencrypted channels I mentioned.

I am using ProgDVB, just like as with Satellite.

Problem is that TechnoTrend DVB-C 2.1 Premium is discontinued and replaced by the newer TechnoTrend DVB-C 2300 and I think ProgDVB does not support it yet, but another software (commercial) MyTheatre is confirmed to work with it.