Corkwin is the porting of Corkscrew to Windows. Like Corkscrew this tool allows you to tunnel SSH through HTTP proxies but from Windows.
Download the executable in the latest Gitub release assets.
To connect through an HTTP proxy with OpenSSH, you can use the following command (replace server.example.com, proxy.example.com and 8080 with correct values):
ssh server.example.com -o "ProxyCommand=corkwin proxy.example.com 8080 %h %p"
Note
Make sure that corkwin is avaible from the current working directory when runnig this command.