LeaderTask

LeaderTask is an application to manage your calendar, appointments, tasks, and projects at the same time.

With LeaderTask you can take notes about anything you need and later put them under a specific category and project. This way, whenever you have to get to work, you can just look for the notes for that project and start where you left off.

The space to write notes is pretty extensive, so you don't have to worry about compressing the information. Additionally, you can include contacts related to a specific date or task, so you can quickly get in contact with them if need be.

LeaderTask lets you filter the notes by deadline, associated contacts, category, and project. It also features reminders, lets you print task lists, and has a very attractive interface that makes your working experience a lot easier.