What are some alternatives?
When comparing Vikunja and Asana, you can also consider the following products
Todoist - Todoist is a to-do list that helps you get organized, at work and in life.
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.
Wekan - The open-source Trello-like kanban (built with Meteor)
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.
Remember The Milk - Remember The Milk is a task and time management application for mobile devices.
Basecamp - A simple and elegant project management system.