Copssh version 6.2.1 installers come with LibreSSL 2.7.3 and an updated cygwin1.dll  (2.10.1 - 20180214), which fixes a newly introduced bug causing files with temporary flag on being not visible for operations. See here  for more information.

Nagwin 3.1.0 contains the latest versions of sub components like  PHP (5.6.36), Nginx (1.14.0), RRDTool (1.7.0),  Pnp4Nagios (0.6.26) and Perl (5.26). Cygwin and GNU tools are upgraded as well. We have also added a number of new check plugins - check_by_ssh, check_cluster, check_ldap, check_mysql, check_mysql_query, check_nt, check_oracle, check_pgsql, check_ping.

cwDup 3.2.0 is contains the latest version of Duplicity (0.7.17) . We have also updated OpenSSH, LibreSSL, Cygwin and GNU tools to their latest available versions.

Copssh version 6.2.0 installers contain OpenSSH 7.7p which is primarily a bugfix release. Major relevant changes:

• ssh(1)/sshd(8): Drop compatibility support for some very old SSH implementations, including ssh.com <=2.* and OpenSSH <= 3.*. These versions were all released in or before 2001 and predate the final SSH RFCs. The support in question isn't necessary for RFC-compliant SSH implementations.
• sshd(8): Add "expiry-time" option for authorized_keys files to allow for expiring keys.
• ssh(1)/scp(1)/sftp(1): Add URI support to ssh, sftp and scp, e.g. ssh://user@host or sftp://user@host/path.  Additional connection parameters described in draft-ietf-secsh-scp-sftp-ssh-uri-04 are not implemented since the ssh fingerprint format in the draft uses the deprecated MD5 hash with no way to specify the any other algorithm.

Copssh version 6.1.3 comes with the latest version of LibreSSL (2.7.2). Cygwin and other GNU tools are also updated to their latest available version.