I’ve worked on various projects that used various task management applications hosted in the cloud (software as a service). I hear about new ones every so often, so I decided to note them here for future reference.

• Pivotal Tracker - Anyone trying to adopt the agile / scrum method of development has likely used this.
• BaseCampHQ.com - This is the first Rails application. The reason Ruby on Rails exists. Simple and elegant.
• Wrike.com - Very flexible. Can be used to multiple people, in different organizations, matching any special hierarchy of tasks.
• PlanScope.io
• Asana.com