I have been using this Module on my i9505 since the first version.
It works REALLY nice, and i was considering buying the full version.
Unfortunatelly, developer @MohammadAG
seems to have stoped developing it, or maybe he is busy.
The app has some bugs. (it still does not work with Gmail, and also causes weird bugs if you try to use it on Phone app, to notify missed calls)
It would be awesome if the development coninued. The dev could add an option for multiple notifications, since right now, it only flashes the collor of the last received notification.
Anyways, i use it for Whatsapp (green) , Snapchat (yellow) and Facebook (Blue). Give it a try.
Phone: Samsung Galaxy S4 i9505
Carrier: Vivo Brasil
Rom: WanamLite XXUFNB8 V2.2 Android KitKat 4.4.2
Recovery: CWM 18.104.22.168 Advanced Edition PhilZ Touch