What development stack are you using?

I have been deep in the Microsoft camp of development for more than a decade. Occasionally when I look into what my OSS counter-parts are up to I find myself instantly confused by all the various languages and frameworks. To make matters worse a lot of the technologies seem to be fad driven (will Node.js be widely used in three years?). It is unclear to me what OSS development stacks have made it past the honeymoon period and are now in wide adoption.

As an example, if you were to ask me what the typical web development stack is for a Microsoft shop I would say:

Framework: ASP.Net MVC

Language: C#

Web Server: IIS 7.5

Data Layer: Entity Framework, NHibernate or straight ADO.Net.

Database: SQL 2008 Standard

OS: Windows Server 2008 Web (for IIS), Windows Server 2008 Standard (for stand-alone SQL), Windows Server 2008 Enterprise (for clustered SQL)

Training: Pluralsight has just about everything I need from beginner to advanced to train staff. Alternatively, highest rated books on Amazon using the above keywords also works out really well.

Technical Reference: MSDN is the go to technical reference for all of the above products once initial training is complete.

So, what is your development stack? What resources would you give your staff for training? If you were a Microsoft guy, where could you go for training on your stack?

Framework: Rails

Language: Ruby

Front end:Coffeescript/Backbone

Server: S3

Database: SQLite

I forgot to ask another really important question: What dev enviroment?

Obviously I'm using Visual Studio 2010.

Framework: Rails/CakePHP/NodeJS

Language: Ruby/PHP/Javascript

Web Server: Nginx/Ubuntu

Database: MySQL/Postgres/MongoDB/Redis

OS: OSX 10.7.3

Technical Reference: API Documentation

Dev Evironment: RVM, Zsh, Vim, Git, and thousands of lines of custom dotfiles

This is the stack I have been using for a few years. This is a stable, reliable stack with tools of tools, IDE support and a solid community around it.

Framework: Spring MVC, Spring Security, JAX-RS, JSP+Tiles, JQuery, Maven Language: Java Web Server: Apache Tomcat 6., Jetty Data Layer: Hibernate Database: MySQL 5 OS: Linux, Mac OS X

I am trying the following stack, which may be more flexible.

Framework: Backbone MVC+JQuery+Bootstrap, Spring Core, Spring Security, JAX-RS, Maven Language: Java Web Server: Apache Tomcat 6., Jetty Database: MongoDB OS: Linux, Mac OS X