Add Developer-First Products (#1914)

Co-authored-by: Sindre Sorhus <sindresorhus@gmail.com>

readme.md

@@ -555,6 +555,7 @@
 - [Wardley Maps](https://github.com/wardley-maps-community/awesome-wardley-maps#readme) - Provides high situational awareness to help improve strategic planning and decision making.
 - [Social Enterprise](https://github.com/RayBB/awesome-social-enterprise#readme) - Building an organization primarily focused on social impact that is at least partially self-funded.
 - [Engineering Team Management](https://github.com/kdeldycke/awesome-engineering-team-management#readme) - How to transition from software development to engineering management.
+- [Developer-First Products](https://github.com/agamm/awesome-developer-first#readme) - Products that target developers as the user. 
 
 ## Work