We are planning a new project that will involve four separate (but closely linked) web sites and an API, and are looking for a tool to help us manage all the ideas.
We would like something (preferably web-based) where we can set up a hierarchical structure, so ideas for each site can be kept together, but we can drill down into each site and see the main areas that the site covers, then drill down into each area and see the specific features in that area.
As we are still in the early planning stage, it's important to have a tool that allows discussions, so someone can suggest an idea, others can comment on it, and then when a specification has been settled, the discussion can be turned into a task.
We are currently using GitHub issues for this, but as it's not hierarchical, it's becoming very confusing trying to keep it organised. The discussion side of GitHub is excellent though.
I've been looking at infinitymaps.io, which has many of the features we would like, but I can't see that discussions would work well there.
Anyone able to recommend anything? Free would be great, but a modest price isn't an issue if it gets us something better.