doc: updated links and references to similar projects

docs/md/links.md

@@ -117,6 +117,7 @@ I hope this list can grow much more in the future:
     - [Native Scripting](https://www.youtube.com/watch?v=iIUhg88MK5M).
     - [Native Scripting (now with virtual functions!)](https://www.youtube.com/watch?v=1cHEcrIn8IQ).
     - [Scene Hierarchy Panel](https://www.youtube.com/watch?v=wziDnE8guvI).
+    - [Properties Panel](https://www.youtube.com/watch?v=NBpB0qscF3E).
   * [Ability Creator](https://www.erichildebrand.net/blog/ability-creator-project-retrospect):
     project retrospect by [Eric Hildebrand](https://www.erichildebrand.net/).
 

docs/md/references.md

@@ -42,5 +42,8 @@ I hope this list can grow much more in the future:
   * [Specs](https://github.com/amethyst/specs): a parallel ECS based mainly on
     hierarchical bitsets that allows different types of storage as needed.
 
+* Zig
+  * [zig-ecs](https://github.com/prime31/zig-ecs): a _zig-ification_ of `EnTT`.
+
 If you know of other resources out there that can be of interest for the reader,
 feel free to open an issue or a PR and I'll be glad to add them to this page.