Below are some of the Best Wordpress Plugins that you can try it:
Akismet - The best blog comment spam prevention plug-in. Ships free with WordPress, but you still have to turn it on and keep it updated.
Adsense Deluxe - a great way to manage AdSense ads on your blog.
Facebook Photos - A nice WordPress plug-in that allows quick access to your Facebook photos and the ability to integrate them in to any post within WordPress with ease.
Flickr Photos - Same as Facebook Photos, but for use with a Flickr account.
Feedburner Feed Replacement - sooner or later, most people switch to Feedburner for their RSS needs. This plugin redirects all the RSS feeds on your blog to the Feedburner one. Might cause problems with Technorati.
LightBox 2 - A fade effect that you see on a myriad of blogs you visit these days where you click the image, the background fades and then the image itself displays in full view. A very nice effect to have.
Sitemap Generator - everyone who cares about SEO (and that should be everyone) should have this one.
Super Archive - Creates a great dynamic archive for your Wordpress blog posts.
Stat Traq - Get detailed statistics in a very effective graphical format.
Sociable - adds all those cute tiny icons for easy social bookmarking.
Ultimate Tag Warrior - an advanced solution for all your tagging problems.
Wordpress Backup - an absolute must if you want to keep your archive in case of something going wrong.
WP Cache - if your blog ever experiences a burst of traffic, you’ll be thankful you have WP Cache.
For more news on new Wordpress Plugins Releases you can log on to weblogtoolscollection.com
