Astra by Cesbo - Talk to Alexa anywhere, from your iPhone
Future - Calendar events around the clock
Reverb - Use Alexa on your Mac, iPhone and Android
GetStream.io - APIs for the development of scalable newsfeeds and chat applications.
API to bot - Convert your API to Alexa skill or Google Home app in 5 mins
Event Calendar App - A simple, easy to manage, way of displaying events