JavaCard OS

I want to use a kind of smart card for encryption and signature of my email.
I tried to Google and found that probably I also need a PKCS11 module for my cards.
Does anyone know this similar solution? Or recommend some cards to fit my needs. Thanks

I think it's not so much the card as the softwate drivers. Google for 'OpenSC' on Github or Sourceforge and they have software to setup PKCS11.

I guess this page is useful.
BTW, OpenPGP Smartcard = OpenPGPApplet + JavaCard

If you have no smartcard reader, then OpenPGPApplet + eJava Token is good choice.