Like the title says, regenarate Thumbnails after you've changed the settings (size) of it in the option-media.php panel.
The only secure way to handle multiple web service accounts without using the same password.
The scroll kit plugin allows you to completely transform the visual appearance of an individual wordpress post or page.
A simple tool that helps with placeholder images when building a theme.
A javasript clone of placehold.it
ShareMeNot is a Firefox add-on designed to prevent third-party buttons (such as the Facebook “Like” button or the Twitter “tweet” button) embedded by sites across the Internet from tracking you until you actually click on them.
gMap is a lightweight jQuery plugin that helps you embed Google Maps into your website.
allowing anyone who can build a Web site to participate in making Firefox addons
UniConvertor is a universal vector graphics translator. It uses sK1 engine to convert one format to another.
This plugin will fix the missing PNG-Transparency in Windows Internet Explorer 5.5 & 6.
This plugin lets you use images to replace the titles of your posts.
http://wordpress.org/extend/plugins/ttftitles/
Plugins and techniques to strech the Wordpress Admin to new heights
The dimensions plugin extends jQuery with dimension centric methods. It has been rigorously tested and gives accurate results cross-browser. Methods like width and height are extended by dimensions to enable you to get the width and height of both the win
PixGallery, automatically checks the actual size of your images agianst the width and height specified in your html and creates a cached thumbnail images based upon your desired image size and links the cached thumbnail it into your html code