fring is a mobile internet community and communication service that allows friends to connect, share experiences and enhance their online communities together. Using your handset's internet connection, you can interact with friends on all your favourite social networks including Skype, MSN Messenger, Google Talk, ICQ, SIP, Twitter, Yahoo! and AIM. You can listen to music with your Last.fm friends, check out what each other are up to on Facebook, receive alerts of new Google Mail and tailor make your very own fring by adding more cool experiences from fring Add-ons.
Fring is a mobile app. for most phone OS, i use symbian S60 v5, means touch screen, and the program is farely compatable with it.
its not only twitter, who ever used fring at all you can sync with your Live, Yahoo, G-mail, Skype, Facebook & twitter (latest version includes a lot of other social networks, check website for details)
it uses the phone UI, so its relatively easy to work with, im only going to talk about the twitter part, its kind of hard to navigate through at first but it gets easier after your first post with it, unfortunately for those with limited data...