I'm starting an app open-source. Consists of an emergency "sonar", which you will publish notices and reply too with your connected peers. And I need suggestions and collabs. Can see on my GitHub: github.com/roqueando/konarium.io
Who is interested in helping in backend or frontend I started a workgroup on slack too, so here is the room: todevmore.slack.com
If you have a question, comment below I will reply.