Pipedrive - Sales pipeline software that gets you organized. Helps you focus on the right deals, so easy to use that salespeople just love it. Great for small teams.
Google Groups - Google Groups allows you to create and participate in online forums and email-based groups with a rich experience for community conversations.
Zoho CRM - Omnichannel CRM for Businesses of all sizes
Galette - Galette is a membership management web application towards non profit organizations.
Freshsales CRM - A full-fledged CRM for high-velocity sales teams.
Bigtent - BigTent is a web-based organization and communication portal for groups.