What Application development technologies there are?

In the case of ASP.NET, a developer can use Microsoft Visual Studio to write code. But, as with most other programming languages, he/she can also use a text editor. Notepad++ is an example. WebORB Integration Server for .NET can be used to integrate .NET services, data and media with any web client. It includes developer productivity tools and APIs for remoting, messaging and data management.

For ColdFusion and the related open source CFML engines, there are several tools available for writing code. These include Adobe Dreamweaver CS4, the CFEclipse plugin for Eclipse (software) and Adobe CF Builder. You can also use any text editor such as Notepad++ or TextEdit.

For Java (programming language), there are many tools. The most popular are Apache Tomcat, GlassFish, JDeveloper and Netbeans but there are many others.
For PHP, the Zend Development Environment provides numerous debugging tools and provides a rich feature set to make a PHP developer's life easier. WebORB Integration Server for PHP can be used to integrate PHP classes and data with any web client. It includes developer productivity tools and APIs for remoting, messaging and data management. Tools such as Hammerkit abstract PHP into a visual programming environment and utilise component-based software methods to accelerate development.
Other tools include various browsers, FTP clients, etc.

Practicing code reuse and using web application frameworks can greatly improve both productivity and time to market. Reusing externally developed components can allow an organization to reap the above benefits, while potentially saving money. However, for smaller components, it might be just as easy to develop your own components as it would be to learn new APIs. Also, if a component is essential to the business, an organization might want to control its development.