Raneto - Open source, flat-file Knowledgebase platform that uses static Markdown files
gitSQL - Database source control for SQL Server, PostgreSQL
HowHive - Knowledgebases for teams and companies of all sizes. Knowledge sharing and finding made simple.
Flyway - Flyway is a database migration tool.
Obsidian.md - A second brain, for you, forever. Obsidian is a powerful knowledge base that works on top of a local folder of plain text Markdown files.
Liquibase - Database schema change management and release automation solution.