Figma - Team-based interface design, Figma lets you collaborate on designs in real time.
Google Groups - Google Groups allows you to create and participate in online forums and email-based groups with a rich experience for community conversations.
Invision - Prototyping and collaboration for design teams
Galette - Galette is a membership management web application towards non profit organizations.
Sketch - Professional digital design for Mac.
Bigtent - BigTent is a web-based organization and communication portal for groups.