Open Source Software for PostgreSQL
EdgeDB
EdgeDB is a database designed on top of Postgres with the goal of eliminating some of the shortcommings of relation and NoSQL databases. At first glance, EdgeDB looks like a regular object relational mapper (ORM), however it's far more than that, It's a full-fledged database with a formally-defined query language, a migrations system, a suite of client libraries in different languages, a command line tool, and a soon comming cloud hosting platform. The goal of EdgeDB has been to rethink every aspect of how developers model, migrate, manage, and query their database.
Antares SQL
Antares SQL is an open source SQL client made to be simple. It's a modern, fast and productivity driven, and forever 100% free solution with a focus in UX.
Objection.js
Objection.js is an ORM (Object Relational Mapper) built on top of knex for Node.js. Objection.js aims to stay out of your way and make it as easy as possible to use the full power of SQL and the underlying database engine while still making the common stuff easy and enjoyable. Even though ORM is the best commonly known acronym to describe objection, a more accurate description is to call it a relational query builder. With Objection.js you get all the benefits of an SQL query builder but also a powerful set of tools for working with relations.
Planplan
Planplan.io is an open source alternative search engine allowing users to find products from trusted merchants whose reviews we verify. Our solution is for everyone who is looking for products such as online stores wishing to index their products quickly