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An open-source Python framework that auto-generates a REST API, admin back-office, and React CRUD UI from your data models, for developers building internal tools locally.
Works offlineOpen source
What to know▼
How it works
define data models once in Python; generates API, admin panel, and UI automatically
What's different
open source, local-first, data stays on your infrastructure
Best for
developers building CRUD apps without hand-building each layer
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An open-source local SQL database engine built on Prolog with B+Tree indexes and a browser-based localhost workspace.
Nothing to installOpen source
What to know▼
How it works
An open-source local SQL database built on SWI-Prolog with persistent storage, B+Tree indexes, recovery, streaming imports, verified backups, and a browser-based localhost workspace (AsAPanel).
What's different
Keeps data on your own machine without a cloud server.
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An open source Postgres connection pooler, load balancer and sharding proxy built by database engineers, for scaling Postgres without app changes.
Open source
What to know▼
How it works
An open source connection pooler, load balancer and sharding proxy that sits in front of PostgreSQL to scale it without requiring changes to the application.
What's different
Postgres-compliant proxy built by database engineers, aimed specifically at sharding and pooling rather than being a general API gateway.
Pricing
Open source.
Best for
Teams scaling a Postgres deployment who want pooling and sharding without rewriting their application.
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Backs up your Supabase Postgres database and storage files to your own S3-compatible bucket, then proves the backups actually work with weekly automated restore drills. Built for developers running Supabase in production.
Open source
What to know▼
How it works
Backs up a Supabase project's Postgres database and Storage files to your own S3/R2/B2 bucket, then runs weekly automated restore drills in a throwaway sandbox, verifying tables, rows, and checksums.
What's different
Proves backups are actually restorable through scheduled restore drills, rather than just taking backups on faith.
Best for
Developers running Supabase in production who need verified, restorable backups.
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A free, open-source, self-hosted Protobuf schema registry for engineers who want to manage and version their Protocol Buffers without vendor lock-in, as a lightweight alternative to Buf.
FreeOpen sourceSelf-hosted
What to know▼
How it works
A self-hosted registry for managing, versioning, and distributing Protocol Buffers.
What's different
Lightweight alternative to Buf without vendor lock-in.
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A free, open-source, browser-based ERD tool for visually designing database schemas and relationships before writing migrations. Built for developers, not graphic designers despite the tag.
FreeNo sign-upNothing to install
What to know▼
How it works
A browser-based tool for visually designing database schemas — drag out tables, define columns and relationships, and get an entity-relationship diagram.
Pricing
Free and open source.
Best for
Developers who want to plan a data model before writing migrations, not graphic designers.
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An open-source Kubernetes operator: add a database row and it provisions a running app, deactivate the row to tear it down. Apache 2.0, for developers and DevOps teams.
Open sourceSelf-hosted
What to know▼
How it works
An open-source Kubernetes operator that treats a database as the source of truth for infrastructure — adding a row provisions a fully running, continuously reconciled app stack, and deactivating the row tears it down.
What's different
Infrastructure is driven by database rows rather than manifests or a separate deployment pipeline.
Pricing
Open source, Apache 2.0.
Best for
Developers and DevOps teams who want to provision and tear down app stacks by editing database rows.
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An open-source tool that generates and keeps JSON schemas in sync with your code, for developers building and validating APIs. It doesn't offer its own API despite the framing.
Open source
What to know▼
How it works
Automatically generates JSON schemas from your code and keeps them synchronized with your models.
What's different
Open-source and focused on keeping schemas in sync with code changes rather than a one-time generation.
Best for
Developers building and validating APIs who need schemas to stay current with their models.
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Self-hosted, open-source REST API that exposes MyAnimeList data through 70+ read-only endpoints, requiring no database or API key.
Open sourceSelf-hosted
What to know▼
How it works
Exposes public MyAnimeList data through 70+ read-only JSON REST API endpoints covering anime, manga, characters, users, rankings, seasons, reviews, and recommendations; written in Go, runs as a single binary with no database, API key, OAuth flow, or MyAnimeList developer credentials required.
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A free, open-source visual canvas for drawing data models — tables and joins — and exporting them to Google's Open Knowledge Format, for data and analytics engineers who want a schema their text-to-SQL tools can read.
FreeOpen sourceCan export my data
What to know▼
How it works
A visual canvas for drawing data model tables and joins, or letting AI draft them, then exporting to Google's Open Knowledge Format so an LLM-based text-to-SQL tool can read your schema.
What's different
Google only shipped a viewer for OKF; this is the authoring canvas, with sample models from GA4, Stack Overflow and Bitcoin.
Pricing
Free and open source, no sign-in required.
Best for
Data and analytics engineers who want a portable, git-friendly schema for text-to-SQL tools.
