Herd Your Tasks with Nitro
Still haven't found a task manager that fits your needs? Perhaps you should take a look at Nitro.
It doesn't offer any revolutionary functionality, and the current version doesn't even allow you to sync data across different platforms and devices (although this feature is in the works). But this no-frills task management tool offers all the basic features that can help you to keep tabs on your tasks and to-dos with a minimum of effort. For each task, you can specify priority and deadline, and color codes make it easier to identify the urgency of each task.