What are some alternatives?
When comparing Effitask and Nozbe, you can also consider the following products
Todoist - Todoist is a to-do list that helps you get organized, at work and in life.
Markor - Text editor - Notes, ToDo & Bookmarks. Markdown and todo.txt support.
Trello - Infinitely flexible. Incredibly easy to use. Great mobile apps. It's free. Trello keeps track of everything, from the big picture to the minute details.
todotxt.net - A minimalist, keyboard-driven Windows GUI for your todo.txt file
Wrike - Wrike is a flexible, scalable, and easy-to-use collaborative work management software that helps high-performance teams organize and accomplish their work. Try it now.
Todo.txt - Track your tasks and projects in a plain text file, todo.txt. A todo.