Multi Column Category List Display your Category lists in multiple columns inside WordPress. There are many other features associated with this plugin such as custom headers to help separate the plugins.
Feed Styler is a WordPress plugin that allows you to add style (sheets) to your feeds much like Feedburner does for theirs. Just a word of caution: this will also style the feeds that people view on their feedreaders and many users might not want their feeds styled.
Yahoo! Static Maps renders a static inline Yahoo! map when a post has Address, City and State custom fields defined. No javascript required for this plugin.
re: Multi-Column Category list
I have a Greasemonkey extension for Firefox that does the same job (except it also works with WordPress.com blogs).
http://engtech.wordpress.com/t.....ess/wpcatr
If you want to incorporate geolocations in your blog, check out WikiMap plugin at http://wikimap.sf.net