Expiration Reminder VS Strikethru

EssentialPIM - EssentialPIM is a free Personal Information Manager that keeps up with the times and lets you manage appointments, tasks, notes, contacts, password entries and email messages across multiple devices and cloud applications.

Task Coach - Task Coach is a simple open source todo manager to keep track of personal tasks and todo lists.

Todo.txt - Track your tasks and projects in a plain text file, todo.txt. A todo.

CherryTree - A hierarchical note taking application, featuring rich text and syntax highlighting, storing data in a single xml or sqlite file.

GTDNext - About Us.

FacileThings - FacileThings is a website where users can take control of their life and their day by organizing the things they need to do so they can focus on living a stress-free life. Read more about FacileThings.