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