amoCRM is the world's first messaging-powered CRM. Multi-channel communication lets you converse through messengers, emails, and calls from a single app. Now every interaction with your customers can be a personalized one-on-one dialogue. Plus managers love its powerful analytics, reporting, and automation tools. It's the perfect messenger-based sales solution for entrepreneurs and SMBs.
Microsoft Outlook - Organize your world. Outlook’s email and calendar tools help you communicate, stay on top of what matters, and get things done.
Pipedrive - Sales pipeline software that gets you organized. Helps you focus on the right deals, so easy to use that salespeople just love it. Great for small teams.
Thunderbird - Thunderbird is a free email application that's easy to set up and customize - and it's loaded with great features!
HubSpot CRM - Free CRM software for small businesses.
Front - multi-channel inbox service for collaborative teams
Keap - Grow Sales. Save Time. Get Organized.