CiviCRM - A Constituent relationship management for the Civic Sector
Vtenext - Vtenext is a platform that allows you to tackle CRM processes and customers with great ease.
EspoCRM - EspoCRM is open source CRM (Customer Relationship Management) software that allows you to see, enter and evaluate all your company relationships regardless of the type.
QuotaPath - Calculate commission and quota attainment easily, for free
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.
Taimer - Taimer is a PSA solution designed for service companies to reduce the hassle in their work, get paid quickly, and sell more.