Microsoft Office Access - Access is now much more than a way to create desktop databases. It’s an easy-to-use tool for quickly creating browser-based database applications.

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

My Visual Database - Using My Visual Database, you can create databases for invoicing, inventory, CRM, or any specific purpose.

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

MongoDB - MongoDB (from "humongous") is a scalable, high-performance NoSQL database.

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