There is a growing number of tools out there that can help communities co-govern online.
Loomio - A forum platform developed by a worker co-op based on the practices of the Occupy movement. Encourages groups to move their discussions toward decisions. But doesn't specify what, for your group, counts as a decision, or the structure of the organization. Might pair well with CommunityRule.
Loomio - Make decisions without meetings
Discourse - Self-hostable forum software often used for governance in DAOs and other self-organized communities.
Discourse - Civilized Discussion
Open Collective - Financial and legal hosting for online communities, providing high levels of transparency in the sources and uses of a group's money. Enables supporters to make recurring payments.
Decidim - Designed to support the city government of Barcelona, but is increasingly being used as a platform for petitions, decision-making, and participatory budgeting in civil society groups.
CommunityRule - An experimental app for authoring and publishing simply bylaws documents.
Metagov prototype - An experimental tool enabling user-defined governance processes that integrate with widely used platforms, such as Discourse, Slack, and Open Collective.