Basecamp Personal - a completely free version of Basecamp designed with freelancers, students, families, and personal projects in mind. Use it for hobbies, weddings, small events, side projects, volunteer gigs, etc.
Dropbox Paper is a place where you and your team can generate ideas together over an internet connection. Share any type of content, make changes to what you already have and get notified when someone else makes suggestions. The creativity flow has always better when teamwork.