Update README.md

README.md

   - [Serverless](#serverless)
   - [Configuration](#configuration)
   - [LLMs](#llms)
+  - [Feature management](#feature-management)
   - [Third Party APIs](#third-party-apis)
   - [Extensions](#extensions)
   - [Miscellaneous](#miscellaneous)
 * [OpenAI Client for Laravel](https://github.com/openai-php/laravel) - OpenAI PHP for Laravel is a supercharged PHP API client that allows you to interact with OpenAI API.
 * [PHP Mistral AI SDK](https://github.com/SoftCreatR/php-mistral-ai-sdk) - A powerful and easy-to-use PHP SDK for the Mistral AI API, allowing seamless integration of advanced AI-powered features into your PHP projects.
 
+### Feature management
+*Libraries for implementing feature flags, a/b tests, and remote configuration*
+
+* [Featurevisor](https://featurevisor.com) - Feature flags management with Git, supporting [PHP SDK](https://featurevisor.com/docs/sdks/php/)
+
+
 ### Third Party APIs
 *Libraries for accessing third party APIs.*