Kialo - Kialo is the platform for rational debate. Empowering reason through friendly and open discussions.
GrowthList - A crowd-sourced list of growth hacks
DebateGraph - Graph visualization of: Join a global community of mappers with over half a million ideas and 30,000 maps. Click on the bubbles to explore, and log-in to create free public & private maps on any topic!
GrowthHackList - 100+ curated growth hacks for makers + early stage startups
Rationale - Rationale let's you create, online, argument maps.
Growth Hack World - Together We Rise