From the tray icon,I'd say it was Yahoo! Widgets, formally Konfabulator.
(
Kamikaze Stoat £4.09,
Sun 26 Aug 2007, 3:10,
archived)
sod thatI barely use my desktop, as all my windows are maximised
(
Neon Blue Ah ha ha haa! I feel positively capital!,
Sun 26 Aug 2007, 3:14,
archived)