Update README.md

Author: isaacsas

README.md

@@ -118,6 +118,8 @@ Catalyst.jl](https://www.youtube.com/watch?v=5p1PJE5A5Jw).
 - [DelaySSAToolkit.jl](https://github.com/palmtree2013/DelaySSAToolkit.jl) can
   augment Catalyst reaction network models with delays, and can simulate the
   resulting stochastic chemical kinetics with delays models.
+- [BondGraphs.jl](https://github.com/jedforrest/BondGraphs.jl) a package for
+  constructing and analyzing bond graphs models, which can take Catalyst models as input.
 
 
 ## Illustrative examples