Extend your Wordpress installation with those numerous free resources :

Wordpress themes

{WP 2.5 compatible}
WideJournal : A clean, 3-column, SEO optimised theme adapted for large resolution display. The strength of WideJournal also resides in its header section which comprises of a random rotating banner, quick links and buttons for handy tasks like automatic bookmarking and translation jobs.

{WP 2.5 compatible}
MyJournal : Offered in numerous flavors, the MyJournal Wordpress themes bring unity between content, design and features. A left sidebar region that sits permanently while scrolling along your blog is provided for essential tools like bookmarking and translation buttons so that your visitors can get what they want from a click’s reach.

{WP 2.6 compatible}
ColourFull Wall : It’s dark and minimalist : it’s the ColourFull Wall theme based on Chris Pearson’s Pressrow codes, ColourFull Wall provides you with a nice, light and aesthetic theme that puts your content right in front of your visitors.

…and the repository : Best of Wordpress themes galore provides the best sites for downloading free Wordpress themes together with handy tips for choosing the right theme for your blog.

…complete theme download repository is here.

Wordpress plugins

{WP 2.5 compatible}
More Smilies 2.1 : Easily put life and emotion into your blog posts with adorable(animated too) smilies and allow your visitors to select smilies while commenting.

Cloudy smilies package : More Smilies also comes bundled with several cutely smilies packages including the Cloudy Smilies pack, read further instructions here.

Wordpress tutorials

Optimise, boost and put your blog ahead of the crowd with those easy-to-follow guides :

The Things you should know series:
• Things you should know for choosing the right domain name
• Things you should know when using post excerpt
• Things you should know when displaying pages in Wordpress
• Things you should know when using the div element
• Things you should know when using permalinks

…more problogging tutorials :
• How-to turn visitors into returning visitors
• 8 Powerful Ways To Add Value To Your Blog
• how to keep the everlasting blogging love
• The sure way to get at the top of any blog toplist and boost your traffic
• Give visitors what they want
• Making it quick and easy for you to bookmark and earn traffic
• Generate all the fun stuffs for your blog
• The proper way to write code in your blog posts
• Hiding your image buttons for some sidebar goodness
• Making it to the Technorati Top 100
• More fun with random picking of post in Blogger and Wordpress
• a click to more feed subscribers
• MyAvatars : gravatars for all!
• The simplest way to earn more feeds subscribers
• Is that URL too long?
• Don’t be down when your domain is down
• Emalimage: get yours!
• how-to : getting ads work for you!

…some speed boosting tutorials :
• 3 really simple ways to speed up your blog
• Resize your post’s images to boost your blog’s speed.
• 3 really simple ways to speed up your blog

…check out some reviews :
• Be part of a community with MyBlogLog
• When blogs laugh at us
• Have fun with reviews and get paid.
• Forget Agloco; earn real money while surfing

… aid for the webdesigners :
• The ultimate icons collection
• The resourceful webdesigner’s toolkit.
• how to make your own smilies
• Preview your web designs on any version of Internet Explorer
• Safari is out for Windows, go get it!
• A quick remedy to your theme modding addiction

…some too for Google’s Blogger blogging platform :
• how-to contact form for blogger
• Could blogger beat wordpress?
• The power of social bookmarking for Blogger

…Wordpress hacks,tweaks and mods :
• Quick shooting stats of your Wordpress blog
• How blogging old are you?
• Feel good at your WP Admin Panel

Or chronologically walk through past posts.

elsewhere :

http://www.blog.spoongraphics.co.uk/category/freebies/

hacking wordpress :
http://www.blogohblog.com/10-wordpress-hacks-to-make-your-life-easy/
http://www.hongkiat.com/blog/40-most-wanted-wordpress-tricks-and-hacks/
http://www.noupe.com/wordpress/most-desired-wordpress-hacks-11-common-requests-and-fixes.html