CiviCRM

Monica is an open-source personal CRM that allows you to organize and record your interactions with friends and family and help you keep track of everything important.

EspoCRM is an open source self-hosted CRM that allows you to see, enter and evaluate all your company relationships regardless of the type.

Teamgate is a web-based complete sales CRM solution designed to strengthen and simplify your entire sales process by connecting, organizing, researching, and analyzing leads from a single system.

Pipeline CRM is a powerful CRM highly adopted by small and midsize businesses. It allows users to manage their contacts, qualify leads, and track leads and deals within a singular, cloud-based program.

SuiteCRM is an open-source CRM solution that provides a 360-degree view of your customers and business. Making it easy for your sales, marketing, and customer service departments to discover key information that will help you grow, retain, and delight your customers.

Streak is a fully embedded workflow (CRM) and productivity software in Gmail that empowers you to manage all your work right in your inbox. Streak often replaces entire CRMs and also provides a suite of email power tools like email-tracking.

BenchmarkONE is a marketing automation and CRM platform that aims to help marketers and business owners better track and engage new and existing consumers.

Capsule is an easy-to-use CRM for businesses to manage contacts, build relationships, make more sales, and be more organized. It offers advanced collaboration and task management features and is available as a cloud platform and mobile app.

Really Simple Systems is an easy-to-use cloud CRM system that's designed for growing teams. There's a customizable sales CRM, plus options for marketing and service tools and external app integrations.

Freshsales is a cloud-based salesforce automation software that helps businesses manage leads, customer engagement, client relationships, and more through a unified platform.