Thunder Client is great (https://www.thunderclient.com/)

- Really nice having it integrated into the IDE - Happy with their release cadence - Support/dev has gotten back to me quickly - Does most of the important stuff from Postman imho

And if you need something simple, REST Client in VSCode is great for simple use cases.

Along with that, if you are using IntelliJ (or any flavor of it i.e. Webstorm) you can build out http requests natively in there as well and save them to any file ending in .http