Basecamp : A tool for project management & collaboration

Recently I started using basecamp and really like their offerings. They have very intuitive interface to work with and any project, no matter how big it is, is easy to setup. It provides setting up milestones, todo lists, track time, message board as well as whiteboard where multiple people can edit the document (much like wiki).

Its good for startups, opensource projects, non-profits or heck personal projects. They have quite different pricing models, starting with free base service. Checkout at :