Basecamp

Basecamp is a project management software based in Chicago, which is most likely familiar to most people and supports teams in working together more productively and organized. The offerings include a message board, to-dos, docs & files, automatic check-ins, group chats, and so-called "Hill Charts" which provide users the opportunity to keep an eye on their projects including context. Basecamp can be used for free for smaller, personal projects, as well as in the business version (from $99 per month). The tool can be tested for free for 30 days.