Authpush is an easy, code-less way to send push notifications to your users.
We also have an API at https://github.com/authbaseco/authpush-api.
Also made by a 15y/o.
GetSiteControl is an easy-to-use set of smart widgets for website optimization. Surveys, lead forms, contact forms, live chats, popups, social media buttons — all in one place!