CiviCRM - A Constituent relationship management for the Civic Sector
Clearbit - Clearbit provides Business Intelligence APIs
Pipeliner CRM - Pipeliner CRM empowers small to medium-sized sales teams to close more deals and lower risk. Implementation and training are a breeze. Mac & Windows.
Memotoo - Memotoo allows you to sync your data (contacts, calendar, tasks, .) with phones (iPhone, Android, Samsung, ..
WORKetc CRM - All-in-one business management system. CRM + Social + Projects + Billing
Free Address Book - In our contact management software you can store fast and easily name, phone numbers, birthdays, address, company name, city, mobile numbers, insurance and loan info, e-mail addresses.