OneSignal - Customer engagement platform used by over 1 million developers and marketers; the fastest and most reliable way to send mobile and web push notifications, in-app messages, emails, and SMS.
Face Slim - Web App for Facebook. Lightweight, ad-free, chat support and modern look.
Truepush - Unleash limitless possibilities with Truepush and save up to $600 monthly. Free up to 10K Subscribers on all features.
Tinfoil for Facebook - Download Tinfoil for Facebook app for Android. Tinfoil for Facebook is for those users that require a Tinfoil hat. .
PushCrew - Push Notifications for Websites
Friendly for Facebook - Friendly is the most complete Facebook Lite and FB Messenger alternative.