Vtiger
Defined by its mission to not only build but to also deliver CRM that is accessible, customizable and intuitive for businesses ranging from small to medium, Vtiger remains a popular software supported by a large community of active developers and users. Due to its wide audience, Vtiger is available in over 10 different languages as it is used by various countries across the world. Developed with over a decade of input from thousands of different businesses, Vtiger is often heralded as one of the best when it comes to a dynamic software with extreme customization while still being affordable. Instead of building itself on a for-profit setup, it runs through a more open source design, pooling together the talents of various designers and businesses to create its software deliverable through a cloud. Such innovation has allowed it to evolve into arguably the most well-used and well-known CRM tool among smaller businesses.