message: Add more GUI inspiration links
diff: @@ -19,12 +19,14 @@ We might also want to eventually investigate implementing the programming enviro
  - [fructure](https://github.com/disconcision/fructure)
  - [Glamorous Toolkit](https://gtoolkit.com/)
  - [Hazel](https://hazel.org/)
  +- [Houdini Networks](https://www.sidefx.com/docs/houdini/network/index.html)
  - [Livelits](https://github.com/hazelgrove/livelits-tyde/blob/master/livelits-tyde.pdf)
  - [medit](https://github.com/molikto/medit)
  - [MPS](https://www.jetbrains.com/mps/)
  - [Pharo](https://pharo.org/)
  - [Self](https://www.jetbrains.com/mps/)
  - [Symbolics Lisp](https://twitter.com/RainerJoswig/status/1213528401774071813)
  +- [Unreal Blueprints](https://docs.unrealengine.com/en-US/Engine/Blueprints)
  ### Collections
  