Plugins,as the name suggest, are great tools which are used to enhance the functionality of WordPress blogs by addition of a wide range of useful features. They are basically pieces of code that are created or developed specifically to achieve the purpose. Plugins are perhaps the most interesting feature of WordPress as it allows developers as well as users to make changes as well as additions to its functionality beyond its core installation. They can be placed in the desired location inside your template by function hooks.
At the moment, WordPress has over 26,000 plugins in its database. You can tailor your website according to your needs and requirements with the help of these plugins.
1.To understand how WordPress Plugins work and how to install them on your WordPress blog, see Plugins.
2.There is a comprehensive list of articles and resources for Plugin developers, including external articles on writing WordPress Plugins, and articles on special topics, in Plugin Resources.
3.To learn the basics about how WordPress Plugins are written, view the source code for well-written Plugins, such as Hello Dolly distributed with WordPress.
4.Once you have written your WordPress Plugin, read Plugin Submission and Promotion to learn how to distribute it and share it with others.