6sense - 6sense is a B2B predictive intelligence engine for marketing and sales.
Keycloak - Open Source Identity and Access Management for modern Applications and Services.
Leadiro - Seriously Smart & Live B2B Data
Zentyal - Linux directory, domain, mail, gateway and infrastructure server for SMBs.
ZoomInfo - ZoomInfo is a B2B database providing detailed business information on people and companies.
OpenLDAP - OpenLDAP Software is an open source implementation of the Lightweight Directory Access Protocol.