Dolt is a relational database, i.e. it has tables, and you can execute SQL queries against those tables. It also has version control primitives that operate at the level of table cell. Thus Dolt is a database that supports fine grained value-wise version control, where all changes to data and schema are stored in commit log.

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 running a diff on two text files.

migra makes schema changes almost automatic. Management of database migration deployments becomes much easier, faster, and more reliable.

With DB you can very easily save, restore, and archive snapshots of your database from the command line. It supports connecting to different database servers (for example a local development server and a staging or production server) and allows you to load a database dump from one environment into another environment.

Dotmesh captures snapshots from stateful Docker and Kubernetes applications as ’datadots‘, and gives you the ability to label, store and share them as you would with version-controlled code. Dotmesh is an open–source primitive that can be accessed via CLI or API.

Extendable version manager with support for Ruby, Node.js, Elixir, Erlang & more

VersionPress is a free and open source version control plugin for WordPress built on Git. You can:

Undo changes
Create staging sites
Merge databases  ← yes, really!

Simply update your sites with confidence.

A Composer version manager tool. Find newer versions of dependencies than what your composer.json allows.

dbv.php is a database version control web application featuring schema management, revision scripts, and more!

I call this system "Semantic Versioning." Under this scheme, version numbers and the way they change convey meaning about the underlying code and what has been modified from one version to the next.