TwitterFresh

TwitterFresh –  view the Twitter web interface via TwitterFresh, set the number of minutes you would like it to refresh in and it will count down and automatically refresh the page for you.

Twitter Reloaded Userscript

Twitter Reloaded Userscript – “For Fluid: Reloads Twitter every two minutes with an in-page countdown. If there is any text in the status box reloads are postponed.”

twitrefresh

twitrefresh – automatically refreshes Twitter every minute, with a count down displayed at the top of the page.

Twitter Live Updater

Twitter Live Updater – Greasemonkey script that updates Twitter every minute, without you having to refresh the page.