EssentialPIM Pro is a Personal Information Manager (PIM) that makes it easy to control your appointments, tasks, to-do lists, notes, and contacts. With built-in email support, EssentialPIM is an affordable replacement for Outlook. In addition, EssentialPIM Pro offers portability, speed, an intuitive interface, and the ability to synchronize all of your information with your Android smartphone or iOS device, MS Outlook, and Google services (Calendar, Tasks, Drive, Contacts). EssentialPIM Pro has all of the functionality that you would expect in a PIM.

You can get a portable version here.