Yes, there are a few of them.
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ReDoc [Article on swagger.io] [GitHub] [demo] – Reinvented OpenAPI/Swagger-generated API Reference Documentation (I’m the author)
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OpenAPI GUI [GitHub] [demo] – GUI / visual editor for creating and editing OpenApi / Swagger definitions (has OpenAPI 3 support)
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Responsive Fork of SwaggerUI [GitHub] [demo]
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SwaggerUI-Angular [GitHub] [demo] – An angularJS implementation of Swagger UI
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angular-swagger-ui-material [GitHub] [demo] – Material Design template for angular-swager-ui
Hosted solutions that support swagger:
- Apiary – can import from swagger
- Readme.io – can import from swagger
- Lucybot console – supports swagger natively
- Postman – can import from swagger
- Stoplight – supports swagger natively – editing and reading
Check the following articles for more details:
- Ultimate Guide to 30+ API Documentation Solutions
- Turning Contracts into Beautiful Documentation (focused mainly on Swagger)
- An evaluation of auto-generated REST API Documentation UIs (focused mainly on Swagger)
- Free and Open Source API Documentation Tools