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is a project management tool with a big following, highly popular among the small business and consultancy sectors.

It's easy to see why. Basecamp is a simple-to-use intuitive interface that lets project members come in, say what they need to say, and get back to work.

There are no formal task or project management tools in Basecamp, unlike those found in AceProject. Users are assigned projects, and within those projects they are given free reign to create their own to-do lists, events, messages, or "writeboards," real-time collaboration tools.

The mindset for using Basecamp is not so much formal project management so much as project collaboration. There's no time tracking or Gantt charts to be found in this tool. You make a task, you assign a task to another project member or yourself, and off you go. Documents are stored in one place, and aren't tagged to events or tasks.