Please add - membershipworks.com & groovehq.com
MembershipWorks.com - This full service membership management platform includes logins, CRM, private messaging, email service, public profiles, search, mapping, payments, etc. and integrates with email marketing and accounting platforms.
GrooveHQ.com - This helpdesk, email support and ticket management service offers multi-channel support options, has a robust support widget with integrated contact form and integrates with Olark chat.