Push messages are an essential part of connected mobile devices. They are also one of the critical missing pieces in the open source Android ecosystem. Until now, free Android apps would either need to implement their own push notification system, do without any push messaging or use the proprietary Google Cloud Messaging service.
OpenPush is a self-hosted, free alternative push messaging implementation which can either run alongside or as a replacement to FCM.
Interesting that you should point this link on the same day as we had a detailed discussion on this in the development team. The discussion started when the team was discussing alternatives to GCM started because of this thread.
W/e/ would be really interested in being a part in Open Source alternatives to push messaging implementations. Sincerely hope OpenPush develops into more than a conceptual idea and we can all participate in it.
this is pretty amazing! Also strange when you think about it that it has not happened earlier - since it is one of the last bits we need to make Android fully open.