Twitter is close to closing another round of financing for a $100,000,000. Companies are beginning to invest more into this tool due to its vast potential. There are various APIs that allow applications to build on top of the Twitter layer to offer additional services. Some of these applications that use the API are listed below.

Tweetgrid – a powerful Twitter Search Dashboard that allows you to search for up to 9 different topics, events, converstations, hashtags, phrases, people, groups, etc in real-time. As new tweets are created, they are automatically updated in the grid. No need to refresh the page. This tool could be used to listen into chatter about your business or track topics that are important to you.

These are just a few of the hundreds of applications using the Twitter tools. Find out more information on some of these applications and more here.

TwitterCal - Twittercal is a service that connects your Twitter account to your Google Calendar and lets you add events easily, directly from your Twitter account. This is a greate way to sychronize your Google Calendar on the go. » Read more: Twitter Tools