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.
Liquibase : Liquibase is an open source database-independent library for tracking, managing and applying database schema changes
pgLoader : pgloader loads data into PostgreSQL and allows you to implement Continuous Migration from your current database to PostgreSQL.
pgLoader has two modes ...
Infinite ASCII diagrams, save to Google Drive, resize, freeform draw, and export straight to text/html.