swagger.io - Swagger is an open source RESTapi Documentation Tool.
Zapier - Connect the apps you use everyday to automate your work and be more productive. 1000+ apps and easy integrations - get started in minutes.
Slate API Docs Generator - Create beautiful, intelligent, responsive API documentation.
ifttt - IFTTT puts the internet to work for you. Create simple connections between the products you use every day.
Doxygen - Generate documentation from source code
Microsoft Power Automate - Microsoft Power Automate is an automation platform that integrates DPA, RPA, and process mining. It lets you automate your organization at scale using low-code and AI.