Trello. We aren't a tech company (though I subscribe to the every company is a tech company, some just make things) and I'm the only programmer. Trello is by

Trello. We aren't a tech company (though I subscribe to the every company is a tech company, some just make things) and I'm the only programmer. Trello is by far the most intuitive tool for none-trivial I've seen, if anyone knows of a better one I'd be interested. Since Trello had an API I just integrated against that the bits I didn't already have.