(a) Auto placement of end tags.
You can also check all possible code editor in Wikipedia.
2. FIrefox’s developer tool: It is same as other developer tool but it has one very useful feature that when you enable developer tool mode with Ctrl+Shift+i, and hover on the page it shows that Divs html and css instantly.
3. Opera’s developer tool: Opera also have very intuitive developer tool. You can take screenshot from this directly and many important features like others. Press CTRL+SHIFT+i to enable it.
As this post is for newbies, i will highly recommend to download only one extension which is web developer. It has many important and essential features for web developer.
Web developer’s toolbar or extension can be downloaded in Crome or in firefox.
4. (Integrated development environment)
The simple definition for this is a complete tool for developing your web app.
I know IDE should not be here because this post is for newbies. But
you should start from a simple code editor and then use an IDE for better experience and understanding.
And IDE is a mixture of code editor, DBMS,Error indicator, Markup validators, Code completion, debugger, frameworks and many others.
As i am talking about PHP language, so i will give IDEs for PHP web app development.
It is an open source IDE which comes for various languages and also comes for PHP separately. You can find simple and detailed overview of Netbeans in its official website.
Netbeans handles by independent Netbeans community and Netbeans org company. It is maintained and invested by Oracle.
It has powerful code editor which shows errors in different colors.
You will love it when you will start using Netbeans.
Even i am using Netbeans for my PHP projects.
Visit Official website for PHP.
It is similar as Netbeans but has some different capabilities. It is also comes free and can be useful for your PHP projects.
Visit Official website for PHP
(iii) Aptana Studio PHP Editor: Aptana Studio is developed by Aptana Inc., is an open source HTML editor. It is developed on Eclipse platform.
It supports Windows, Linux and Mac OS X. It has also a debugger and very stable and powerful.
Visit Official website.
There are more very powerful IDEs but i have provided that which i have used and they are free.
Hope it will help you.