truthy

Open source headless CMS API written using NestJS, that has pre built modules like User Management, Role Management, Permission Management, Email Module, Account Settings, OTP, Throttling, RBAC support, Localization, and many more. Maintained by gobeam on GitHub, where it has earned 599 stars from the community.

It's actively developed around nestjs, nestjs-backend, api-rest, and is a solid reference for anyone building with these tools.