Marketcircle has released a new developer kit for its award-winning Mac productivity management software Daylite 3 that helps write new plug-ins and widgets. The company has also announced a “Grow with Daylite” contest for plug-ins and widgets that use the Daylite 3 Developer Kit. The contest runs until the end of August, with prizes announced in September — US$1,000 for best plug-in and $500 for best widget. Contest details and the free Developer Kit download are available from the site. To increase the utility of Daylite 3, Marketcircle’s President is inviting all Mac developers — open source as well as ISV, to take advantage of the product’s new developer kit. “Our Grow with Daylite plug-in and widget contest is designed to put a stronger focus on the Mac as a business application platform,” said Alykhan Jetha.