Because big companies are giving away a bunch of cool free stuff online. I always liked the idea behind Konfabulator - but not the $20 registration fee and its associated annoying reminders to pay. Now I don't have to. Thanks Yahoo! Just visit Konfabulator.com to download the engine that will power what will come to be known as Yahoo! Widgets.
More: Yahoo Buys Maker of 'Widget' Applications - Yahoo! News