Expiration Reminder VS Remindax

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.

Strikethru - Strikethru is a kind of to-do list notebook for managing work lists and staying updated with the important tasks.

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

Snipe-IT - Managing assets with a Google doc or a shared Excel spreadsheet is more common than you think.

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

GTDNext - About Us.