Twitter is a powerful marketing tool for websites and blogs when used correctly and often. Here are 5 of the best twitter applications that will add to your site's effectiveness on twitter. Try one or two at a time, or upload them all and give it a go.

Tweetdeck

A twitter management tool for your desktop. TweetDeck is a personal real-time browser, connecting you with your contacts across Twitter. Can also connect you with your Facebook, MySpace, LinkedIn, Foursquare, Google Buzz and more.

TwitPic

TwitPic lets you share photos on Twitter in real-time. You can take and post pictures of projects with your phone or webcam.V ery useful, be creative with how you can use this application.

Twitterfeed

Twitterfeed is a free service that allows you to transmit your blog posts to Twitter via your RSS feed. This means you can send your titles and a shortened url to your twitter automatically, just by posting to your blog or site.

Bit.ly

Bit.ly is a url shorten-er. It keeps stats on how many click you received from twitter and when those clicks happened.

TwtPoll

Engage Your Customers using polls with twtpoll and get feedback.

As always, keep the applications that work best for you and let go of what bogs you down. Social marketing needs to be easy and seamless for it to work it's best for your site or blog. Trying too much at once can overwhelm your efforts to market.