Shantz WP QOTD is the coolest plugin to add quotes to your wordpress blog posts and sidebars in a few easy clicks.
There are many quotes plugins out there. This one has been started by me (Shantanu Goel) with a view to have the best of features and options, ease of use and multiple sources to get the quotes from. (For Complete Details, go to my tech blog)
Add quotes to all your posts automatically.
Widget support - Can also have a widget in the sidebar for quotes.
Customize and style your quotes with your own text and tags.
Multiple sources for quotes (paste in admin page, get from file implemented, fetch from web/rss soon to come)
Multiple patterns for quotes - Random Quote, Quote of the day (all posts display quote of the day), Quote of that day (all posts display quote for their own days)
Pattern for widget can be different
Customization for widget can be different
Add quotes to top or bottom of posts
Custom template tag to add quote anywhere you want
Custom quote boundary decalarator tags/Multiline quote support
Enable/Disable the quotes without deactivating the plugin
Option to exclude pages from displaying quotes
Fetch from web/RSS support
Pics support for quotes
Anything else you want