If you are a regular user of Twitter, you may notice that the majority of the tweets do not in fact come from the web, but instead one of the many Twitter designed apps available. The core reason for this is that logging into your Twitter account whenever you feel like 'tweeting' something does take a little bit of time, while using your mobile phone or an app does make it a whole lot easier.
Not yet to take up Twitter on my phone, I am a FireFox user and managed to come across a great app, it's called TwitterFox. This app sits in the status bar of the browser and allows you to easily view everyone's latest updates, as well as make updates of your own.
Since installing the app I am much more frequent on Twitter and find it a much more powerful social networking site. It is now obvious to me it is not Twitter itself that makes it so popular, but the many ways in which you can use it.