Odoo  CRM  is an open source and collaborative solution that allows a perfect fit to your business process.

Available in Cloud or On Permis, this flexible and parameterizable solution can be used from any location and any devices for immediate visibility into the business through its portals, graphs and kanban views.

Odoo CRM includes support for telemarketing, personal and consolidated agenda management, prospect and opportunity management, sales teams, vendors, customer activity tracking, claims management and customer service

And so you do not forget anything, you can still have a proactive notification service in the application and via email.