Added api management description

README.md

@@ -1756,6 +1756,8 @@ All in one software hosting software.
 
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+[API management](https://en.wikipedia.org/wiki/API_management) is the process of creating and publishing [application programming interfaces (APIs)](https://en.wikipedia.org/wiki/API), enforcing their usage policies, controlling access, nurturing the subscriber community, collecting and analyzing usage statistics, and reporting on performance. 
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 - [DreamFactory](https://www.dreamfactory.com/) - Turns any SQL/NoSQL/Structured data into Restful API. ([Source Code](https://github.com/dreamfactorysoftware/dreamfactory)) `Apache-2.0` `PHP`
 - [form.io](https://form.io) - A REST API building platform that utilizes a drag & drop form builder, and is application framework agnostic. Contains open source and enterprise version. ([Demo](https://portal.form.io), [Source Code](https://github.com/formio)) `MIT` `Nodejs`
 - [Fusio](https://www.fusio-project.org/) - Open-source API management platform which helps to build and manage REST APIs. ([Demo](https://fusio-project.org/demo), [Source Code](https://github.com/apioo/fusio)) `AGPL-3.0` `PHP`