Evercontact - Your contacts always up to date and automatically with Evercontact.

Microsoft Office Access - Access is now much more than a way to create desktop databases. It’s an easy-to-use tool for quickly creating browser-based database applications.

Pobuca Connect - Connect with your contacts.

LiveCode Platform - It is Both Under the GPL and it is also Proprietary if using the GPL version the software you make...

CRM-gx - Contact Management

Redis - Redis is an open source in-memory data structure project implementing a distributed, in-memory key-value database with optional durability.