Apps like Nirvana for GTD®

Here are some great alternatives to Nirvana for GTD® by Nirvanahq, Inc :
DGT GTD & To-Do List
DGT GTD & To-Do List
★4.6
GTD Simple
GTD Simple
★3.3
Chaos Control 2: GTD Organizer
Chaos Control 2: GTD Organizer
★4.2
Chaos Control: GTD Organizer &
Chaos Control: GTD Organizer &
★4.4
CraigsDo: GTD® To-Do List
CraigsDo: GTD® To-Do List
★4.0
Everdo: to-do list and GTD® ap
Everdo: to-do list and GTD® ap
★3.5
ToDodo: To Do List & Reminder
ToDodo: To Do List & Reminder
★4.4
Ultimate To-Do List
Ultimate To-Do List
★4.0
Google Tasks
Google Tasks
★4.5
Task Triage
Task Triage
★4.8
HibiDo: Todo, Calendar & Notes
HibiDo: Todo, Calendar & Notes
★3.8
WeDo: Task/TODO sharing app
WeDo: Task/TODO sharing app
★4.9
Simple To Do List
Simple To Do List
★4.5
MyLifeOrganized: To-Do List
MyLifeOrganized: To-Do List
★4.4
TimeFinder: Time Blocking
TimeFinder: Time Blocking
★5.0
TaskTodo: Todo-List & Reminder
TaskTodo: Todo-List & Reminder
★4.0