In Full Stack development, a “stack” refers to a combination of technologies, frameworks, and tools used for both the front-end (client-side) and back-end (server-side) development of web applications. Different stacks exist to cater to various project requirements, developer preferences, and use cases. Here are some popular stacks used in Full Stack development:

1. MEAN Stack:
   1. MongoDB (Database)
   2. Express.js (Back-End Framework)
   3. Angular (Front-End Framework)
   4. Node.js (Runtime Environment)
2. MERN Stack:
   1. MongoDB (Database)
   2. Express.js (Back-End Framework)
   3. React (Front-End Library)
   4. Node.js (Runtime Environment)
3. LAMP Stack:
   1. Linux (Operating System)
   2. Apache (Web Server)
   3. MySQL (Database)
   4. PHP (Back-End Language)
4. LAMP Stack (Alternative):
   1. Linux (Operating System)
   2. Nginx (Web Server)
   3. MariaDB (Database)
   4. PHP (Back-End Language)
5. Ruby on Rails Stack:
   1. Ruby (Back-End Language)
   2. Ruby on Rails (Back-End Framework)
   3. PostgreSQL (Database)
6. Django Stack:
   1. Python (Back-End Language)
   2. Django (Back-End Framework)
   3. PostgreSQL (Database)
7. Java Stack:
   1. Java (Back-End Language)
   2. Spring Framework (Back-End Framework)
   3. Hibernate (ORM)
   4. MySQL or PostgreSQL (Database)
8. MEVN Stack:
   1. MongoDB (Database)
   2. Express.js (Back-End Framework)
   3. Vue.js (Front-End Framework)
   4. Node.js (Runtime Environment)
9. Ruby on Sinatra Stack:
   1. Ruby (Back-End Language)
   2. Sinatra (Lightweight Back-End Framework)
   3. PostgreSQL (Database)
10. Flask Stack:
    1. Python (Back-End Language)
    2. Flask (Micro Back-End Framework)
    3. SQLAlchemy (ORM)
    4. PostgreSQL (Database)
11. ASP.NET Stack:
    1. C# (Back-End Language)
    2. ASP.NET (Back-End Framework)
    3. Entity Framework (ORM)
    4. SQL Server (Database)
12. Serverless Stack:
    1. AWS Lambda or Azure Functions (Serverless Computing)
    2. API Gateway
    3. AWS DynamoDB or Azure Cosmos DB (NoSQL Database)
    4. Front-End of Choice (e.g., React, Angular, Vue.js)