It doesn’t support OpenVPN, but I’ll leave a plug for the Outline VPN from Jigsaw (Alphabet). [0]
It’s similar in concept to Algo, in that you deploy your own VPN server on a VPS rather than use a hosted service. However, it provides a polished desktop app for deploying the server, and walks you through creating a VPS on DigitalOcean very easily.
This is incredibly helpful, because most folks I’ve helped with VPN setups are not comfortable aren’t handy with a CLI, and I’ve been able to walk more than one person through setting Outline up very easily.