As of Nov 1st 2016, active development on "Windows for OpenSSH" is being done in https://github.com/PowerShell/openssh-portable. 

This repo (https://github.com/PowerShell/Win32-OpenSSH) is being maintained to keep track of releases and issues. The 
[Documentation](https://github.com/PowerShell/Win32-OpenSSH/wiki) for the project is also maintained here in the wiki. 

Release History:
7/26/2018 -- Release 7.7.2.0 with source https://github.com/PowerShell/openssh-portable/releases/tag/v7.7.2.0
1/11/2019 -- Release 7.9.0.0 with source https://github.com/PowerShell/openssh-portable/releases/tag/v7.9.0.0
6/23/2019 -- Release 8.0.0.0 with source https://github.com/PowerShell/openssh-portable/releases/tag/v8.0.0.0
12/17/2019 -- Release 8.1.0.0 with source https://github.com/PowerShell/openssh-portable/releases/tag/v8.1.0.0