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" AsyncController is introduced in ASP.NET MVC 2 while SessionLess controller is introduced in ASP.NET MVC 3. AsyncController allows you to perform long running I/O operation(s) without making your thread idle(i.e., waiting for I/O operations to complete). On the other hand, SessionLess controller allows you to execute multiple requests simultaneously for single user, which otherwise execute multiple requests sequentially due to session synchronization. Understanding these concepts may be easy for you but I have seen a lot of guys become confused on these concepts. In this article, I will show you how to use AsyncController and SessionLess controller in ASP.NET MVC application. I will also compare them and tell you what to use when, where, and the why."

"One common problem with the naming convention and default routing mechanism in ASP.NET MVC is that we tend to group actions in a controller for sharing an URL space. This basically leads to complex controllers with a lot of unrelated methods that break the SOLID principles. Too many responsibilities in a simple class affects maintainability in the long run and causes secondary effects that complicates unit testing. For example, we usually end up with class constructors that receives too many dependencies as it is discussed here in SO."

Async Controller in ASP.NET MVC 3 (and 4)

"The Model-View-Controller (MVC) pattern is an architectural design principle that separates the components of a Web application. This separation gives you more control over the individual parts of the application, which lets you more easily develop, modify, and test them."

"Many people on the forums want to know how to best protect Actions on their Controller using Forms Authentication. The MVC Team has done a nice job introducing Filters (using Attributes) to this latest drop of MVC, and in this post I'll show you how to create a filter that can handle security."

"ASP.NET MVC 3 introduced global filters, which allows you to add the AuthorizeAttribute filter to the global.asax file to protect every action method of every controller. (In MVC versions prior to MVC 3, it was difficult to enforce the AuthorizeAttribute attribute be applied to all methods except login/register. See my previous blog on security for details.) The code below shows how to add the AuthorizeAttribute filter globally."

"FubuMVC is a "Front Controller" pattern-style MVC framework designed for use in web applications built on ASP.NET."

" The jQuery UI widgets are brilliant. They speed up web development no end with those easy to use controls. The downside is remembering all the HTML mark-up and widget options! "

"Many Web applications require a way to restrict access to some resources (such as specific pages) so that those resources are accessible only to authenticated users. The default Web application project template for ASP.NET MVC provides a controller, data models, and views that you can use to add ASP.NET forms authentication to your application. The built-in functionality lets users register, log on and off, and change their password. For many applications, this functionality provides a sufficient level of user authentication."

"You cannot use routing or web.config files to secure your MVC application. The only supported way to secure your MVC application is to use a base class with an [Authorize] attribute, and then have each controller type subclass that base type. "

"Model-View-Controller (MVC) is probably the most cited example of an architectural software pattern. It was conceived by Trygve Reenskaug working in the SmallTalk group at Xerox Parc in 1978. One motivation for the pattern was the separation of concerns: to allow Model objects to be concerned only with modeling business capabilities, not with how their data and methods were presented to the user, nor with capturing or responding directly to user inputs.[1] "

"Naked Objects MVC combines the power of the naked objects pattern with Microsoft's ASP.NET MVC 2 framework. Now you can take a POCO domain object model and turn it into a fully-functional web application in minutes, without writing a single line of user interface code. You can then customise the generic user interface by adding custom style sheets, custom views and custom controllers, following standard ASP.NET patterns."

"backbone.js from DocumentCloud is a small (2KB, packed) open-source library which allows you to apply the MVC (Model-View-Controller) principle to your JavaScript applications. Backbone supplies structure to JavaScript-heavy applications by providing models key-value binding and custom events, collections with a rich API of enumerable functions, views with declarative event handling, and connects it all to your existing application over a RESTful JSON interface."

Handy trick to pass extra data to the controler. 

" Naked Objects takes a domain object model, written as POCOs but following a few very simple conventions, and dynamically creates one or more complete user interfaces for it, using reflection (not 'code generation' or 'scaffolding'). It is highly effective in support of Domain-Driven Design, OO Modelling, and/or Agile Development. Naked Objects MVC builds upon the core framework to create a complete web-based user interface, using ASP.NET MVC 3. The generic user interface may be customised via the .CSS, by adding custom views, or custom controllers, as needed. Entity Framework is used to persist objects on a database. Security may be handled simply via Forms Authentication and attribute-based authorisation, or more comprehensively via Microsoft WIF and an STS. "

Best MVC3 example project I've seen

"The AsyncController class enables you to write asynchronous action methods. You can use asynchronous action methods for long-running, non-CPU bound requests. This avoids blocking the Web server from performing work while the request is being processed. A typical use for the AsyncController class is long-running Web service calls."