Listigator - Online list management and collaborative space combined

[ulewin]

Those of you who liked the simplicity of tadalist may find this new
application quite appealing, as it maintains the simplicity while
boosting the list management functionality.

http://listigator.com which was just recently launched (beta) is a
general purpose list management application with emphasis on
collaboration.

Listigator offers some handy GTD-oriented features, including:
* capability to organize list items into categories/contexts
* capability to save snapshots of lists (for archiving or for using as
a base for a new list)
* capability to tag and search your lists

Lists can be defined as private or shared (both for read and edit), and
similarly to tadalist, there is no charge for using the application.