Bloomerang - Bloomerang is a simple donor database and fundraising software solution that helps nonprofits decrease donor attrition and increase revenue.

ifttt - IFTTT puts the internet to work for you. Create simple connections between the products you use every day.

Kindful - Nonprofit donor database + fundraising tools all in one

Apache Airflow - Airflow is a platform to programmaticaly author, schedule and monitor data pipelines.

Classy - Expressive, flexible, and powerful stylesheets for native iOS apps

Pushwoosh - Mobile-inspired customer engagement platform for high achievers