Gestor de Tareas
A simple task planner: quickly add, edit, and delete tasks.
Minimalist desktop "to do" list
hierarchical note jotter - organise your ideas, notes, facts in a tree
Small Business Appliance
simple php/mysql project management system for sustainability planning
Free flexible open source todo manager featuring hierarchical tasks
Todo task manager with simple, fast and intuitive user interface
Sticky notes/post-it application for linux
Outliner and time organizer for todo lists, events or scheduling tasks
To-do File Type For TextWrangler Codeless Language Module
Manage events and tasks using simple text files.
Better Late Than Never (BLTN), a task manager using Remember the Milk
A GTD-inspired ToDo list manager that tells you what to do next!
Selenio helps you manage your reminders in an extremely quick way
Versatile Personal Information Manager
Cosas is a web emulation of the GTD app Things
HandyOrganizer is a personal information manager (PIM).