Update README.md, adding iPlug2

... to community section

README.md

@@ -145,6 +145,7 @@ and use to get a basic plugin experience:
 - [MIP2](https://github.com/skei/MIP2), host and plugins
 - [Avendish](https://github.com/celtera/avendish), a reflection-based API for media plug-ins in C++ which supports Clap
 - [NIH-plug](https://github.com/robbert-vdh/nih-plug), an API-agnostic, Rust-based plugin framework aiming to reduce boilerplate without getting in your way
+- [iPlug2](https://iplug2.github.io), a liberally licensed C++ audio plug-in framework that supports Clap
 
 ## Programming Language Bindings