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Mobilizon - A free and federated tool to get our events off Facebook
Paperless Post - Paperless Post is an online platform for creating custom card and invitations.
Meetup - Helps groups of people with shared interests plan events and facilitates off line group meetings in various localities around the world.
Get Together - Get Together is an open source event manager for local communities.
Followme - FollowMe from Ringdale is the complete document output management solution, which provides unrivalled flexibility for organizations looking to reduce costs, increase security and improve efficiency.
Punchbowl - A party planning and greeting card website