add a 'documentation generator' section

Author: yanick

implementations.md

@@ -289,6 +289,14 @@ _None currently support draft-06 or later._
 -   [WebStorm](https://www.jetbrains.com/webstorm/), [IntelliJ IDEA](https://www.jetbrains.com/idea/), and other [JetBrains IDEs](https://www.jetbrains.com/products.html?fromMenu#type=ide) - *Code completion, documentation, and validation for JSON and YAML files using JSON Schema. Support for draft-4, draft-6, and draft-7.*
 -   [Eclipse IDE](https://www.eclipse.org/downloads/eclipse-packages) - *Rich JSON edition supporting schema for instantaneous validation and error reporting, completion, documentation.*
 
+#### Documentation generators
+
+- [jsonschematic](https://github.com/yanick/jsonschematic/) - Svelte-based schema viewer. Runs as a local web app.
+
+- [docson](https://github.com/lbovet/docson) - Javascript-based schema viewer.  Runs as a local web app.
+
+- [json-schema-for-humans](https://pypi.org/project/json-schema-for-humans/) - Generate HTML representation of a schema. Python-based.
+
 Schema Repositories
 -------------------