Tweet Pro

Tweet Pro allows you to quickly and easily find Twitter users who share your same interest by allowing you to search through posted messages and profile information. Using this software you can be following people all over the world who share your same interest in minutes.

Software Features:

• Unlimited Twitter Accounts: You can add as many Twitter Accounts as you like or need
• Simple Keyword Search: Find Twitter users who have used the keyword phrases you are searching for in their profile or posted messages.
• Easy Following: Once you have searched for and found Twitter users who share your same interest all that is left is to select and click on the follow button.
• Queue System with Schedule: Tweet Pro will add all your selected Twitter users to the queue for processing with random time intervals. You can also schedule Tweet Pro to only follow Twitter users during a certain time of the day. If you shut down Tweet Pro the next you launch Tweet Pro your queue can start up again right where you left off.
• API Request Tracker: Keep track of how many API request Twitter has given you and how many you have used so far for each account.

Twummize

Twummize puts Summize (now Twitter Search) and Twitter in the same window using a split screen.

Use Quicksilver to Search Twitter

Robin Yang has posted a tutorial on how to use Quicksilver, a Mac OS X tool, to search Twitter. According to her, “Quicksilver is an application launcher, but also a hotkey binder, a web search, a system search, a music controller, a note taker — all depending on how extensible you want it to be." For the details on how to set up the Quicksilver trigger, read her post here.

Tweenky

Tweenky is Twitter with a Gmail interface. (Still in closed beta). Oril Yakuel’s blog has the first screenshots of the service. Tweenky will let you do everything you can do in Twhirl except that it also lets you do more “Gmail-like” things including organizing tweets into folders. You can also save custom searches for easy access later.  

Twisky

On Twisky, you can search for what others are doing and saying. You can search for “who” or “what” from the search boxes at the top of the page or check out the “Twitter Hall of Fame” on the left which highlights the most followed Twitterers.

Twitag

Twitag lets you group, organize, and search through the various hashtags used on Twitter. Essentially, the site functions as a hashtag search engine where the search results display all the tweets containing that hashtag.

TweetBeep

By signing up at TweetBeep you’ll be the first to know who is twittering about you, your products, your company, or your website. TweetBeep will send you twitter alerts by email when a tweet matches your search. You can also check for mentions of your site, even if the link is shortened (like via TinyURL).

twittersearch.flaptor.com

What kind of name is that? The site at twittersearch.flaptor.com aims to be a Twitter search engine, which lets you search Twitter in real-time.

Summize

Fast becoming the most popular of real-time searches is Summize, that lets you search Twitter for a particular word or phrase. Advanced options let you specify whether the tweet should be from a user, to a user, referencing a user, containing a tag, with attitude, or written in a particular language.

Quotably

The service “Quotably” lets you follow conversations on Twitter in a threaded format, which makes it much easier to follow the conversation. To use Quotably, just enter a Twitter username and you’ll see the threads around that user. You can also use the search box to find conversations around certain keywords on the site.