Terrastruct : Terrastruct is a tool to create diagrams that excel at visually explaining complex systems, such as your organization's engineering architecture.
code2flow : Interactive code to flowchart converter. Turn your workflows, algorithms and manuals into easy to understand diagrams via simple code.
migra : migra is a schema comparison tool for PostgreSQL.
It's a command line tool, and Python library. Find differences in database schemas as easily as runn...
PlantUML : PlantUML is an open-source tool allowing users to create UML diagrams from a plain text language
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.