Basecamp is the least terrible I've used, because it has simple task/todo lists with conversations (comments) on each item, due dates, assignments etc. Unfortu

Basecamp is the least terrible I've used, because it has simple task/todo lists with conversations (comments) on each item, due dates, assignments etc. Unfortunately I find their ux/ui painful to use, everything is a custom widget, and seems painfully slow from here (s.e. Asia on not fantastic adsl)