Callmama - Get cheap international calling, international virtual number, Call Mama Gives an added advantage to send message and make calls to non-user of Callmama App.
Apache Airflow - Airflow is a platform to programmaticaly author, schedule and monitor data pipelines.
CallHippo - Easy to use Phone System with World-Class Support
ifttt - IFTTT puts the internet to work for you. Create simple connections between the products you use every day.
Numero eSIM - Numero eSIM is a phone-number app that makes voice and data possible anywhere in the world, for free.
Pushwoosh - Mobile-inspired customer engagement platform for high achievers