My Personal Crypto Pad
My Personal Crypto Pad is an implementation of the OpenPGP standard as defined by RFC4880 . It enables users to secure emails and files with the help of encryption and digital signatures. Encryption protects the contents against an unwanted party reading it. Digital signatures make sure that it was not modified and comes from a specific sender. In addition, it features a key management system to store and manage your public and secret keys. My Personal Crypto Pad interfaces with Windows 8 Mail (utilizing share charms), and can be used with other mail programs (i.e. Gmail, Hotmail, etc.) as well.
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Available in Windows Store