Alternative to
Open options for Basecamp
Basecamp gathers a project's tasks, files, messages and schedules in one place, so the email threads with your client stop sprawling. You pay either per user or a flat monthly fee, and all content is stored on the provider's servers. Anyone who wants the same structure on their own server needs an open-source project tool.
3 open options for Basecamp in the directory, the selected ones first.