Basecamp

Basecamp is a web-based project-management tool developed by 37signals in Chicago and launched in 2004. The Ruby on Rails framework was extracted from the Basecamp project.

Basecamp offers features standard to project management platforms, including to-do lists, wiki-style web-based text documents, milestone management, file sharing, time tracking and a calendar, and a messaging system. Mobile accessibility is supported. Notably, it supports unlimited users. It also offers integration with 37signals' own Campfire product, which expands the group messaging functionality of the core platform. Customization, accessibility, and functionality are extended further by the broad range of apps available for free from 3rd parties. A 2-month free trial is available. Pricing is dependent upon space requirements and the number of concurrent projects, not the number of users.