Onesheet CRM - The Simple CRM for Google Sheets
ifttt - IFTTT puts the internet to work for you. Create simple connections between the products you use every day.
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.
Zapier - Connect the apps you use everyday to automate your work and be more productive. 1000+ apps and easy integrations - get started in minutes.
GetStream.io - APIs for the development of scalable newsfeeds and chat applications.
n8n.io - Free and open fair-code licensed node based Workflow Automation Tool. Easily automate tasks across different services.