Top 9 schema-migrations open source projects

Like diff but for PostgreSQL schemas

GitHub's Online Schema Migrations for MySQL

JPA Schema Generator Plugin

Apache Cassandra / DataStax Enterprise database migration (schema evolution) library

Zero-downtime schema evolution for PostgreSQL

Schema 2 ldif : tool to convert .schema to .ldif files and mange them live into an openldap server

Migrations of MongoDB. Part of @PHPMongoKit

Percona's pt-online-schema-change runner for ActiveRecord migrations.

MongoDB schema and data migration library based on semver