UPDATE:  This was initially a list ONLY out of Twitter book, as people suggest updates, I validate and add to the list, then I will place the update below.  * means it is NOT in the book

I was one of your typical people who did not “get” Twitter back in 2007 when I signed up . It took me a while but I got there.  Once #TwitterBook came out I was anxious to see what else I could learn.  It was a great read for showing value in what most see as a social toy at best.

I had asked Sarah Milstein and Tim O’Reilly about a list of links from their book.  They had compiled a good set of tools for Twitter.   One did not exist, so I will start to compile their list here as well as add to it over time.. for now this is the URLs mentioned in #TwitterBook.

General Links

• Accessible Twitter – Twitter that works with assistive technologies
• Twitter Help – If you need help, get it from the source
• Twitter Search – Search things in Twitter like #FollowFriday
• Yiying Lu – Original creator of the Fail Whale
• GetSatisfaction – Twitter Customer Service
• Spam Issues? – Twitter Spam reporting
• Widgets? – Widgets for Twitter

Twitter Tools

• Hashtags – Tracks and shares hashtags from Twitter
• Tagal.us – Find out what hashtags are all about
• Twtvite – simple event management from Twitter
• TweetBeep – Free Twitter Alerts
• BackTweets – Search links on Twitter
• Twitturly – Top Twitter links Real Time
• TweetMeMe – The hottest stories on Twitter
• MicroPlaza – popular Twitter news
• TwitterCounter – Ultimate Twitter Stats Tool
• Twitalyzer – Track your influence on Twitter
• TweetBrain – Crowdsourcing Questions on Twitter
• TweetChat -
• TweetGrid – Create a search Dashboard
• TwiMailer – Advanced Mailing solution for Twitter
• TwitterFeed – Feed your blog to Twitter
• TipJoy – Get tips on Twitter for charity
• TweetStats – Get stats on usage
• TweetReach – How far did your tweet travel?

Trends and Advanced Searching Tools

• Twist – See and compare trends
• WhatTheTrend – Find out what is trending on Twitter
• TwitScoop – Tag cloud of current Twitter Trends
• Twopular – Popular Trends
• TweetGrid – Create a Twitter Dashboard
• Monittor – Realtime live Twitter monitor

URL Shortners

• 140it – One of the many URL Shortners
• Bit.ly – Customize and track short URLs (What I use)
• Is.gd – Another popular shortner
• Twi.bz – hints at the underlying domain while shortening
• tr.im – track URLS as well
• TinyURL – One of the original URL Shorteners

Picture / Video Services

• TwitPic – Post pics to Twitter
• yFrog – Share pics from Twitter here too *
• Twitvid – If you want to share videos *

Scheduling Services

• TweetLater – schedule Tweets for later

Twitter Themes

• TwitterGallery – Free Twitter Themes
• TwitBacks – Create Twitter Backgrounds

Twitter Directories

• PeopleBrowsr – view your account in a variety of ways
• WeFollow – User powered Twitter Directory
• Twellow – Twitter Directory
• MrTweet – Personal Networking Agent for Twitter
• WhoShouldIFollow – Following Recommendations
• TwitterHolic – Top Twitter Users
• Retweetist – Retweeting lists
• Retweet Radar – More retweeting goodness
• DoesFollow – Find out who follows whom
• FriendorFollow – Who is not following you back?
• TwitterSheep – Tagcloud goodness of your peeps
• TweepDiff – Find out who your missing

Twitter Clients

• Twhirl – Social Software Client
• TweetDeck – Personal Twitter Browser
• Mobile Twitter - small Twitter for small Browsers
• Tweetie – Mac and iPhone Clients
• Twitteriffic
• TwitterBerry – Blackberry Twitter Client
• TinyTwitter – tiny java twitter client

Other

• TrackingTwitter – Find out the top brands using Twitter
• ExecTweets – Top execs and brands on Twitter
• StockTwits – Real time stock tips built on the API
• CoTweet – How business does Twitter

UPDATED June 12th
Added yFrog and Twitvid per Dennis