Mailman - Mailman is free software for managing electronic mail discussion and e-newsletter lists.
Pintask - Pintask is the most customizable Kanban board.
SendPulse - Maximizing e-mail marketing open rates automatically
TaskBoard - A Kanban-inspired app for keeping track of things that need to get done.
mlmmj - Mlmmj is a simple and slim mailing list manager (MLM) inspired by ezmlm.
buckets.co - Feature rich kanban board collaboration platform.