Techmartini.com

Given below are a list of great Wordpress tools.
These plug in’s  are assembled from different websites across the world.

Social Site Integration

Blogmark Integration - Display your Blogmarks list on your blog.

DiggClick - Add the Digg button to the beginning of your posts.

DiggIT - Allows you to add the Digg button, will work even if someone had already submitted your post.

Facebook Comments - Allows you to bring comments on your notes over to the relevant blog post so you can have them all in one place.

Gregarious - Combines a Digg button plugin with Alex King’s popular “Share This” plugin for social bookmarking.

Ma.gnolia Widget - Display links from your Ma.gnolia account using this widget.

Reddit Button - Adds a Reddit button to your blog posts.

StumbleCrumble - Lets you show a pre-determined number of your latest Stumbled websites on your own blog.

Status Indicators

360Voice Bits Plugin - Connects with 360Voice.com to post the latest info on your 360 standings.

AIM Online Status Indicator - Let your readers know if you’re online.

IM Online - Supports AIM, MSN, Yahoo!, Google Talk, Skype and ICQ. Features different icon sets.

MeeboMe Plugin For WordPress - Display a Meebo widget on your blog so you can chat with your visitors.

WP-ICQ-Status - Display your current ICQ status on your blog.

Xbox 360 Gamercard WordPress Plugin - Allows you to display your Xbox 360 Gamecard.

Miscellaneous Site Integration

.Mac Sidebar WP Plugin - Display information from your .Mac account in your WordPress sidebar.

Amazon Wishlist - Add your Amazon Wishlist to your blog, allow your readers to buy you a little something for keeping them entertained.

Bloggersnap - Allow visitors to your site to take a webcam shot and post it to your blog.

EasyPayPal - Allows you to accept payments for many services including subscriptions, trial periods, and more.

Ebay Sales Lister - Display Ebay listings (from your account or others) on your site.

Facebook Photos - Allows easy access to your Facebook photos for use in your blog.

GetWiki - Embed a Wikipedia article anywhere in your blog you like.

iTunesSpy - Display your latest played songs on your WordPress blog.
Last Amazon Review - Displays latest reviews from the Amazon RSS, supports Associate IDs.

MasterWish - Place your wishlist from MasterWish.com on your blog.

Netflix - Share portions of your Netflix queue with your readers, let them know what you’re renting or already have.

Phoogle - Add Google Maps to any of your posts and add as many markers as you’d like.

Slashdot.org Headlines - Display the latest headlines from Slashdot on your site.

PayPal Donate Button - Allows you to add a “Make a Donation” button powered by PayPal.

WP-Twit - Display your latest Twitter postings on your site.

Yahoo Browser-Based Authentication - Allows users to sign in to your blog using their Yahoo ID and password.

Your YouTube Favorite Videos - Display your favorited YouTube videos on your site.

YouTube Video Gallery - Display a gallery of YouTube videos you choose on your site.

Source : mashable.com