<ol>
<li>Backend Frameworks:
<ul>
<li>Express.js (for Node.js): A minimal and flexible Node.js web application framework.
</li>
<li>Django (for Python): A high-level Python web framework.
</li>
<li>Spring Boot (for Java): For building stand-alone, production-grade Spring-based applications.
</li>
<li>Ruby on Rails: A server-side web application framework written in Ruby.
</li>
</ul>
</li>
<li>Database Management Systems:
<ul>
<li>MySQL: An open-source relational database.
</li>
<li>PostgreSQL: A powerful, open-source object-relational database system.
</li>
<li>MongoDB: A document-oriented NoSQL database.
</li>
<li>SQLite: A C-language library that implements a small, fast, self-contained SQL database engine.
</li>
</ul>
</li>
<li>API Testing:
<ul>
<li>Postman: For testing APIs.
</li>
<li>Insomnia: An API client with support for REST and GraphQL.
</li>
</ul>
</li>
</ol>

1. Backend Frameworks:
    
    * Express.js (for Node.js): A minimal and flexible Node.js web application framework.
        
    * Django (for Python): A high-level Python web framework.
        
    * Spring Boot (for Java): For building stand-alone, production-grade Spring-based applications.
        
    * Ruby on Rails: A server-side web application framework written in Ruby.
        
2. Database Management Systems:
    
    * MySQL: An open-source relational database.
        
    * PostgreSQL: A powerful, open-source object-relational database system.
        
    * MongoDB: A document-oriented NoSQL database.
        
    * SQLite: A C-language library that implements a small, fast, self-contained SQL database engine.
        
3. API Testing:
    
    * Postman: For testing APIs.
        
    * Insomnia: An API client with support for REST and GraphQL.

Backend Development