HubSpot - Grow Better With HubSpot: Software that's powerful, not overpowering. Seamlessly connect your data, teams, and customers on one CRM platform that grows with your business.

Todo.txt - Track your tasks and projects in a plain text file, todo.txt. A todo.

Customer.io - We make it easy to send emails triggered by user behavior. Build, measure and improve your emails to activate and retain users

Task Coach - Task Coach is a simple open source todo manager to keep track of personal tasks and todo lists.

Smartech - Smartech is a AI-powered Cross-channel Marketing Automation & Analytics Suite. It helps marketers and product managers LISTEN to and ANALYSE consumer behavior, and execute hyper-personalised campaigns to retain and engage users (CONVERSE).

Strikethru - Strikethru is a kind of to-do list notebook for managing work lists and staying updated with the important tasks.