sshuttle 0.61 for Mac could be downloaded from the developer's website when we last checked. We cannot confirm if there is a free download of this app available. The program lies within Internet & Network Tools, more precisely Network tools. We recommend checking the downloaded files with any free antivirus. The actual developer of this free software for Mac is Avery Pennarun.
From the developer:
sshuttle is a transparent proxy server that works as a VPN. The application supports DNS tunneling. With this program, you have access to a remote network via ssh. You don't necessarily have admin access on the remote network. You can't use openssh's PermitTunnel feature because it's disabled by default on openssh servers.
You may want to check out more software for Mac, such as Sshuttle VPN, which might be related to sshuttle.