Openport is described as 'Easy and secure reverse SSH.
Forward any port, keep track of your machines, share files.
Openport builds a tunnel from your machine to the outside world, so your friends can connect to your services or files directly. Don't worry about firewalls, DNS or FTP' and is an app in the network & admin category. There are more than 10 alternatives to Openport for a variety of platforms, including Linux, Mac, Windows, Android and Self-Hosted apps. The best Openport alternative is Vercel, which is free. Other great apps like Openport are ngrok, LocaltoNet.com, Codesphere and Portmap.io.