Add Hydra Ecosystem section to README (#2487)

Co-authored-by: Ryan Soklaski <[email protected]>

Author: Jasha10

README.md

@@ -54,14 +54,18 @@
 ### License
 Hydra is licensed under [MIT License](LICENSE).
 
-## Community
+## Hydra Ecosystem
 
-Ask questions in Github Discussions or StackOverflow (Use the tag #fb-hydra or #omegaconf):
+#### Check out these third-party libraries that build on Hydra's functionality:
+* [hydra-zen](https://github.com/mit-ll-responsible-ai/hydra-zen): Pythonic utilities for working with Hydra. Dynamic config generation capabilities, enhanced config store features, a Python API for launching Hydra jobs, and more.
+* [lightning-hydra-template](https://github.com/ashleve/lightning-hydra-template): user-friendly template combining Hydra with [Pytorch-Lightning](https://github.com/Lightning-AI/lightning) for ML experimentation.
+* [hydra-torch](https://github.com/pytorch/hydra-torch): [configen](https://github.com/facebookresearch/hydra/tree/main/tools/configen)-generated configuration classes enabling type-safe PyTorch configuration for Hydra apps.
+
+#### Ask questions in Github Discussions or StackOverflow (Use the tag #fb-hydra or #omegaconf):
 * [Github Discussions](https://github.com/facebookresearch/hydra/discussions)
 * [StackOverflow](https://stackexchange.com/filters/391828/hydra-questions)
 * [Twitter](https://twitter.com/Hydra_Framework)
 
-
 ### Citing Hydra
 If you use Hydra in your research please use the following BibTeX entry:
 ```BibTeX