Push4Free

If all you want is a simple and fast (push) notification on your mobile when an event was triggered without spamming your inbox and keeping track of mailinglists etc... read on....

Push 4 Free is a very clean and simple push service as a server and client solution.

It is my answer to all the "free" push services (including GCM) where you eventually have to pay for each message send (!!).

You will need to install a P4F server to connect. This is only the client for receiving the notifications.

More information can be found on the github p4f site:

https://github.com/cybertim/push4free

The whole protocol, android app and webservice are GPLv2.