Splitgraph is a data management, building and sharing tool inspired by Docker and Git that works on top of PostgreSQL and integrates seamlessly with anything that uses PostgreSQL.

Splitgraph allows the user to manipulate data images (snapshots of SQL tables at a given point in time) as if they were code repositories by versioning, pushing and pulling them.

XgeneCloud is an API Framework platform that instantly generates REST / GraphQL APIs on any SQL database.

• Supports MySQL, PostgreSQL, MSSQL, SQLite & MariaDb.
• Comes with a builtin GUI Database Client and API Client.
• Host generated APIs as Serverless Functions on any Cloud Platform.

Open Source cross-platform SQL Editor and Database Manager. Use Beekeeper Studio to query and manage your relational databases, like MySQL, Postgres, SQLite, and SQL Server. Available for Windows, Mac, and Linux.

Free multi-platform database tool for developers, SQL programmers, database administrators and analysts. Supports all popular databases: MySQL, PostgreSQL, MariaDB, SQLite, Oracle, DB2, SQL Server, Sybase, MS Access, Teradata, Firebird, Derby, etc.

Franchise is a lightweight but powerful SQL tool with a notebook interface.

osquery allows you to easily ask questions about your Linux, Windows, and macOS infrastructure. Whether your goal is intrusion detection, infrastructure reliability, or compliance, osquery gives you the ability to empower and inform a broad set of organizations within your company. osquery gives you the ability to query and log things like running processes, logged in users, password changes, USB devices, firewall exceptions, listening ports, and more.
You can perform ad-hoc queries or schedule them, optionally enable file integrity monitoring and process accounting too

Superset is a data exploration platform designed to be visual, intuitive and interactive.

Superset's main goal is to make it easy to slice, dice and visualize data. It empowers users to perform analytics at the speed of thought.

Superset provides:

A quick way to intuitively visualize datasets by allowing users to create and share interactive dashboards
A rich set of visualizations to analyze your data, as well as a flexible way to extend the capabilities
An extensible, high granularity security model allowing intricate rules on who can access which features, and integration with major authentication providers (database, OpenID, LDAP, OAuth & REMOTE_USER through Flask AppBuiler)
A simple semantic layer, allowing to control how data sources are displayed in the UI, by defining which fields should show up in which dropdown and which aggregation and function (metrics) are made available to the user
Deep integration with Druid allows for Superset to stay blazing fast while slicing and dicing large, realtime datasets
Fast loading dashboards with configurable caching

Phinx makes it ridiculously easy to manage the database migrations for your PHP app. In less than 5 minutes you can install Phinx and create your first database migration. Phinx is just about migrations without all the bloat of a database ORM system or framework.

sqlmap is an open source penetration testing tool that automates the process of detecting and exploiting SQL injection flaws and taking over of database servers. It comes with a powerful detection engine, many niche features for the ultimate penetration tester and a broad range of switches lasting from database fingerprinting, over data fetching from the database, to accessing the underlying file system and executing commands on the operating system via out-of-band connections.

Query Editor: think of JS Fiddle for SQL queries. It's your way to share data in the organization in an open way, by sharing both the dataset and the query that generated it.
Visualizations: once you have a dataset, you can create different visualizations out of it.
Dashboards: combine several visualizations into a single dashboard.

A tool for easy online testing and sharing of database problems and their solutions.

A minimalist database toolkit for PHP5.

Object relational mapper (ORM), fluent SQL query builder and Active Record implementation for PHP.

A tutorial covering SQL indexing and SQL tuning for developers: avoiding unnecessary details about database internals.

SQL indexing is the most effective SQL tuning method and requires the same care as schema design yet it is often neglected during development. Use The Index, Luke explains SQL indexing from the source code perspective—covering ORM tools like Hibernate and Doctrine.

Python SQL injection framework

Alembic is a new database migrations tool, written by the author of SQLAlchemy.

SQLFormat is a free online formatter for SQL statements.

DOM Storage Query Language (DomSQL) is an SQL inspired interface for DOM Storage (or Web Storage as defined in the W3C working draft).

PHP Object Relational Mapper

ActiveRecord for JavaScript (ORM)

DataBase Interfaces Kreator - Create a PHP Web front-end for a MySQL PostgreSQL Oracle MS SQL Server database in a minute