Micro Work 4 all - New Website aiming to get more workers and job seekers to perform tiny task and make money.
Todoist - Todoist is a to-do list that helps you get organized, at work and in life.
Picoworkers - Earn money from doing short, easy tasks similar to Microworkers. Picoworkers is the best alternative to Microworkers I ever find.
TaskPaper - Plain text to-do lists for Mac
Amazon Mechanical Turk - The online market place for work.
Microsoft To-Do - Task management tool