Zurmo
When it comes to open source CRM software, there are a lot of different choices one can choose from that is available on the market. Currently, Zurmo has proven to most people that it is by far the best open source CRM software available on the entire market. It has received a few different awards for the excellent results that it gets those who use it. This particular CRM software can be used by both large organizations and startup companies. It has a large amount of features for people to take advantage of, and some of its most popular features are integrations, developer friendly, on the go, internationalization, security, personalize, marketing automation, product management, workflow, deal tracking, reporting, contact management, gamification, and activity management.