CiviCRM is a web-based, open source CRM system, designed specifically to meet the needs of advocacy, non-profit and non-governmental organizations. Elected officials, professional/trade associations, political campaigns and parties, government agencies, and other similar organizations are among its growing number of enthusiastic users.

SuiteCRM is an open source CRM developed and maintained by SalesAgility, a CRM developer that also offers consulting, migration, and support services. Organizations of all sizes use SuiteCRM, from enterprises to startups to non-profits.

amoCRM — is a simple accounting system for potential customers, which will help you to monitor and increase your sales. This online CRM system, is more functional than Excel, but much easier to use than other complex and expensive programs. AmoCRM requires no installation or configuration — just create an account on the website and your personal CRM system is ready for operation.

Apptivo is the perfect small business suite for google apps. Apptivo has CRM, Project Management, Invoicing, Timesheets and more. Apptivo's business suite consists of 40+ apps that are integrated and seamlessly work with each other. The information is shared across apps, so data once created can be used everywhere improving overall productivity.

Realvolve is a Real Estate contact relationship manager (CRM) that helps agents manage contacts, listings, escrows, tasks, files, and important dates. Realvolve keeps real estate agents and brokers organized, effective, and mobile.

Streak CRM has gathered more than 750K+ happy customers. Small businesses use this platform primarily for their hiring purposes. In 2018 Steak platform was recognized by Google as their Top Technology partner of the year.

Freshsales CRM is all-in-one project software, that is free and can enhance team collaboration and communication and streamlines the entire project management journey. This CRM brings context, collaboration, and productivity that helps you sell better.

Commence is a complete CRM solution designed to automate the front-end business process that impacts the sales execution and customer service including contact and account management and email.

Tamarac CRM is a web-based client relationship management system designed specifically for independent advisors and built on the trusted Microsoft Office 365 platform.

OnePageCRM is an easy to use sales CRM used by sales people and business owners worldwide. Ideal for small to medium sized businesses. Inspired by Getting Things Done (GTD) Productivity principles, you're encouraged to add Next Actions to ensure you always follow up with your prospects.