Many libraries ( a good 30% surveyed) said they did not use any third party applications to enhance their library’s twitter account. The other 70%, however, did use some sort of application. The most popular, in order of those mentioned most:*

Twhirl
A social software desktop client, based on the Adobe AIR platform.

• Runs on both Windows and Mac OSX…
• connects to multiple accounts (i.e., Friendfeed, Iaconi.ca, seesmic, Twitter)…
• notifications on new messages…
• shortens long URLs…
• posts images to TwitPic…
• search Twitter tweets via TweetScan and Twitter Search.

Twitterfeed (and RSS/OpenID)

Automatically twitters your RSS feed to all your followers on Twitter.

• Signing up is simple; you need an OpenID account and a Twitter account.
• Takes your Blog or RSS or ATOM feed and tweets it to all your followers
• Choose how often you want your feed updated, the title of your posts
• Automated – requires no work once it’s set up

Ping.fm
Updates all your social networks at once.

• posts your message wherever you want
• supports over 30 social networking sites and is adding more regularly (i.e., Facebook, MySpace, WordPress, Tumblr, Flickr, etc.)
• messages can be sent via mobile phone/SMS/MMS, Instant Message/Email, and 3rd party apps/API

Twittermail
Allows you to send tweets from your email inbox

• Give your twitter credentials to TwitterMail.com and they’ll give you your own email address
• Receive all of your tweet replies directly in your inbox.
• Allows you to go over the 140 character limit – TwitterMail will simply write “read more” once you hit the 140-limit.
• Has the ability to delay postings for a specified time
• Converts longer URLs to shorter ones.

TweetDeck
Adobe AIR desktop app takes twitter feeds & breaks them into more manageable bits of info.

• Sleek design
• Allows users to split main feed (All Tweets) into 3 columns: All, direct replies and @replies
• Allows users to group tweets or followers (and create columns to manage the information)
• Automatically updates

Firefox plugins (i.e., Twitterfox)
Firefox application that notifies you of your follower’s tweets

• Adds a tiny icon in the status bar that notifies you when your friends update their status
• Has a text box for you to send your own tweets

TwitPic
Lets you share photos on Twitter

• sned pictures from your phone to your Twitter account
• Tag pictures, send messages with them

Twuffer
Allows coordination of calendar with Twitter account

• type your tweet and then schedule when you want it to post by the day/hour/month
• schedule appointment/milestone reminders

TweetLater
Boasted as “productivity tools for busy Tweeple”

• allows you to set up alerts and track keywords in the publc twitter stream
• schedule and publish tweets that go only to yourself
• schedule tweets to go out when you’re not at your own computer
• sends automated thank you notes to new followers

Twitterlocal
track locations of tweets

• type in a zip code and search within 1, 2, 3, 5, 10 or 20 miles within those tweets
• create RSS or XML feeds to filter out tweets within a certain area
• serach by city, state or zip code
• great for finding active twitterers in your locale

Also mentioned:
- Spaz - opensource Twitter client for Mac, Windows or Linux

- Natsulion - Twitter client for Mac OSX

- Java_Script used to add Twitter to web page

- Applications through Blogger and WordPress blogs

* many of those surveyed gave information they used for personal use/for their iPhones (e.g., Twitterific). The list above includes those used for Library accounts only (not personal accounts).