Postman - The Collaboration Platform for API Development
Cypress.io - Slow, difficult and unreliable testing for anything that runs in a browser. Install Cypress in seconds and take the pain out of front-end testing.
TablePlus for Windows - A native GUI tool for MySQL, PostgreSQL, SQL Server & more
ChocolateChip-UI - Light, customizable front-end framework for apps and sites
Postman for Mac (Beta) - Build, test, and document your APIs faster
Selenium - Selenium automates browsers. That's it! What you do with that power is entirely up to you. Primarily, it is for automating web applications for testing purposes, but is certainly not limited to just that.