Today when I was working on my theme, I found that the changes were not being shown at times. This problem is due to the default Cache system of WordPress. It does not give you any option to delete it’s cache also.
That’s why I installed WordPress Cache Inspect. The plugin helps us analyse the behaviour of the cache builtin to WordPress v2.0. It provides the administrator with a quick overview of how the cache is performing and allows the cache to be cleared manually from an Admin page.
Installation is easy. All you have to do is upload and activate the plugin. And a menu ‘Cache’ comes up under Manage in the Admin Panel. From there you will be able to clear the cache whenever you want.
As long as you are logged in, the plugin displays a small semi-transparent box in the top right hand corner of the page that displays the administrator with a quick overview of how the cache is performing.
Note: This plugin requires WordPress 2.0 or later to function as it relies on the existance of the cache and the ability to detect plugin activation/deactivation to register the new manage_cache role.
I have added this plugin to the WordPress Plugin Collection which currently lists out 40 useful plugins 
