gcm topic
AndroidHeartBeatFixer
Way to set heartbeat interval and the User receive PushNotifications from GCM. Based on related post in Google Forums about HeartBeat problem.
Pulse
A simple script to send GCM/FCM messages.
gocryptfs
Encrypted overlay filesystem written in Go
andpush
Android Push Notification in Ruby: The fastest client for FCM (Firebase Cloud Messaging)
pushing
Finally, push notification framework that does not hurt. currently supports Android (FCM) and iOS (APNs)
PushNotifications
small zero-dependency php lib to wrap Android (FCM) and Apple (APNS) Push-Notifications
SwCrypt
RSA public/private key generation, RSA, AES encryption/decryption, RSA sign/verify in Swift with CommonCrypto in iOS and OS X
node-pushnotifications
Push notifications for GCM, APNS, MPNS, AMZ (automatic detection from device token)
OneSignal-Android-SDK
OneSignal is a free push notification service for mobile apps. This plugin makes it easy to integrate your native Android or Amazon app with OneSignal. https://onesignal.com