One of the biggest omissions in Windows Phone 7 is the lack of a way to manage tasks, a consequence of the Microsoft's initial decision to focus on consumers rather than businesses. You can't even sync with Outlook tasks. Task Arranger won't solve that particular problem, but it will let you manage tasks on your WP7 device, through a rather pretty interface. The developers have a sense of humour too, if you watch the video. You can download a free trial to Task Arranger through the Windows Marketplace; it currently retails for $2.99.
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"A planner is a gentle man, with neither sword nor pistol.
He walks along most daintily, because his balls are crystal."