Crunchbase - Crunchbase is a platform for discovering industry trends, investments, and news about companies around the world.
Mapus - Open source map tool with real-time collaboration
Owler - Owler is a crowdsourced data model allowing users to follow, track, and research companies.
Kalygo - Free, Open Source, Reusable Smart Contract Components
CB Insights - CB Insights is a company database for the venture capital and corporate development community.
Open Source Tools Stack! - Top 50+ open source tools to build your brand!