General Tools
Making HTTP requests
Postman is a great tool for testing APIs. It is available as a Chrome app or as a native app for Mac, Windows, and Linux.
HTTPie is a command line tool for making HTTP requests. It is available for Mac, Windows, and Linux.
SQL managing
DBngin is a free tool for managing MySQL, PostgreSQL, and Redis databases on Mac.
TablePlus is a free tool for managing MySQL, PostgreSQL, and Redis databases on Mac.