Hiver - Manage Customer Support, Sales and Projects right from your Gmail inbox. Collaborate with Shared Labels, Shared Contacts, email notes, email reminders and email templates
Zapier - Connect the apps you use everyday to automate your work and be more productive. 1000+ apps and easy integrations - get started in minutes.
Clean Email - Clean Email is an online service that empowers you to take control of your mailbox.
Make.com - Tool for workflow automation (Former Integromat)
MailClark - The Slack bot for external communications
ifttt - IFTTT puts the internet to work for you. Create simple connections between the products you use every day.