Intercom - Intercom is a customer relationship management and messaging tool for web businesses. Build relationships with users to create loyal customers.

Kajabi - Kajabi is the only Knowledge Commerce platform today with everything you need to market, sell, and deliver your knowledge online.

Drift - A messaging app that helps you grow your business.

Tendenci - Tendenci - The Open Source AMS is a cloud-based​ all-in-one management SaaS solution for Non-profits and Associations.

C++ - Has imperative, object-oriented and generic programming features, while also providing the facilities for low level memory manipulation

YourMembership - YourMembership provides membership management software integrated with social networking features.