diff --git a/README.md b/README.md
index d31a22c..61328a4 100644
--- a/README.md
+++ b/README.md
@@ -25,6 +25,7 @@ A collaborative list of great resources about RESTful API architecture, developm
   * [Mocking](#mocking)
   * [Public REST APIs To Use In Tests](#public-rest-apis-to-use-in-tests)
 * [Documentation](#documentation)
+* [API Gateway](#api-gateway)
 * [SaaS Tools](#saas-tools)
 * [Miscellaneous](#miscellaneous)
 
@@ -217,7 +218,14 @@ the Design of Network-based Software Architectures](https://www.ics.uci.edu/~fie
 * [ReDoc](https://github.com/Rebilly/ReDoc/) - OpenAPI/Swagger-powered three-panel documentation.
 * [Slate](https://github.com/lord/slate) - Beautiful and responsive three-panel API documentation using Middleman.
 
-## SaaS tools
+## API Gateway
+
+* [Kong](https://github.com/Kong/kong) - Scalable, distributed, and plugin oriented API gateway backed by Nginx.
+* [Tyk API Gateway](https://github.com/TykTechnologies/tyk) - Lightweight API gateway with analytics logging, written in Go.
+* [API Umbrella](https://github.com/NREL/api-umbrella) - API management platform for exposing web services, with web interface and analytics, written in Lua.
+* [WSO2 API Management](https://github.com/wso2/product-apim) - API management tool with lightweight gateway and API lifecycle manangement, written in Java.
+
+## SaaS Tools
 
 * [Runscope](https://www.runscope.com/) - Automated API Monitoring & Testing.
 * [Ping-API](https://ping-api.com/) - Automated API Monitoring & Testing.
@@ -225,6 +233,7 @@ the Design of Network-based Software Architectures](https://www.ics.uci.edu/~fie
 * [Apiary](https://apiary.io/) - Collaborative design, instant API mock, generated documentation, integrated code samples, debugging and automated testing.
 * [Amazon API Gateway](https://aws.amazon.com/api-gateway/) - Amazon API Gateway is a fully managed service that makes it easy for developers to create, publish, maintain, monitor, and secure APIs at any scale.
 * [Apigee](https://apigee.com) - Apigee is the leading provider of API technology and services for enterprises and developers.
+* [3scale](https://www.3scale.net/) - Nginx based API gateway to integrate internal and external API services with 3scale's API Management Platform.
 * [Assertible](https://assertible.com) - Continuously test and monitor your APIs after deployments and across environments.
 * [Moesif](https://www.moesif.com) - API Analytics for Debugging, Monitoring, and Usage Tracking for RESTful and GraphQL.