Terrastruct : Terrastruct is a tool to create diagrams that excel at visually explaining complex systems, such as your organization's engineering architecture.
pgLoader : pgloader loads data into PostgreSQL and allows you to implement Continuous Migration from your current database to PostgreSQL.
pgLoader has two modes ...
code2flow : Interactive code to flowchart converter. Turn your workflows, algorithms and manuals into easy to understand diagrams via simple code.
Azimutt : Azimutt is an Entity Relationship Diagram (ERD) targeting real world database schema (big & messy).
Liquibase : Liquibase is an open source database-independent library for tracking, managing and applying database schema changes
Infinite ASCII diagrams, save to Google Drive, resize, freeform draw, and export straight to text/html.
