chilkat 

Chilkat .NET Class Library (64-bit) for SSH/SFTP, FTP, PDF, CAdES, XAdES, REST, POP3, SMTP, IMAP, SSL/TLS, Zip, REST, OAuth2, HTTP, RSA, XML DSig, Encryption, Compression, XML, Socket, XMP, HTML to XML, JSON, JWT, OAuth1, conversion, PKCS12/PFX, Java Keystore, ASN.1, PEM, ECC, Async, ...

ChilkatNativeLib

Chilkat .NET Class Library (32-bit) for SSH/SFTP, FTP, PDF, CAdES, XAdES, REST, POP3, SMTP, IMAP, SSL/TLS, Zip, REST, OAuth2, HTTP, RSA, XML DSig, Encryption, Compression, XML, Socket, XMP, HTML to XML, JSON, JWT, OAuth1, conversion, PKCS12/PFX, Java Keystore, ASN.1, PEM, ECC, Async, ...

Chilkat .NET Core Class Library

Chilkat Runtime Component for Universal Apps for SSH/SFTP, FTP, POP3, SMTP, IMAP, SSL/TLS, Zip, REST, HTTP, RSA, Encryption, XML DSig, WebSocket, Compression, XML, Socket, XMP, HTML to XML, JSON, JWT, conversion, PKCS12/PFX, Java Keystore, ASN.1, PEM, ECC, Async, ...