cal.com : Open source meeting scheduling tool. Send a link, let others book a slot. Calendly alternative.
Keycloak : Keycloak is an Open Source Identity and Access Management solution for modern Applications and Services.
Documize : Documize is an open source modern, lightweight and comprehensive alternative to Confluence.
It's built with Golang + EmberJS and compiled down to a si...
Cachet : Beautiful & simple service statuses. The open source status page system, for everyone.
GitLab is a web-based Git repository manager with wiki and issue tracking features. GitLab offers hosted accounts similar to GitHub, but also allows its software to be used on third party servers.