DiffyPick
What your schemas really are, not what migrations claim
What it does
Visual schema diff and sync for PostgreSQL, MySQL, MariaDB, SQL Server and SQLite. See what changed, cherry-pick what to apply, run it safely. Desktop app for macOS, Windows and Linux.
Does the same job
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- BDBi-directional sync between Postgres and SQLite2023 · powersync.com · ▲356
Hi HN, Today we’re launching PowerSync, a Postgres<>SQLite bi-directional sync engine that enables an offline-first app architecture. It currently supports Flutter, React Native and web (JavaScript) using Wasm SQLite in the browser, with more client SDKs on the way. Conrad and I (Ralf) have been working on our sync engine since 2009, originally as part of a full-stack app platform. That version of the system is still used in production worldwide and we’ve learnt a lot from its use cases and scaling. About a year ago we started on spinning off PowerSync as a standalone product that is…
- AAArctype, a cross-platform database GUI for developers and teams2022 · arctype.com · ▲200
Hi HN! I’m Justin, founder and CEO of Arctype, and we’re very excited to share Arctype with the community. Arctype is a cross-platform GUI (soon to be open-sourced) to manage and query your databases, with built-in collaboration and visualization. It currently supports Postgres, MySQL, and SQLite, as well as newer-generation databases like ClickHouse, PlanetScale, and Yugabyte (and more coming very soon!). Think of Arctype as “phpMyAdmin meets Postman”. Most of our team grew up learning how to program using the LAMP stack and we missed the experience of interacting with our databases using…
Database Schema Gallery by DrawSQL2020 · ▲156Collection of 200+ database diagram templates for developers
More dev tools this month
the category →
Open-source GTM skills for technical founders
Dev tools · 29d ago · gtmcofounder.com
OpenTrailPaper is open-source bike computer firmware for the LilyGO T5S3 4.7" E-Paper PRO. It supports offline maps, GPX routes, FIT recording and Bluetooth sensors.
Dev tools · 1d ago · opentrailpaper.com
Launched alongside, August 2026
the whole month →- TL
Life & fun · 9d ago · louisabraham.github.io
- SA
Hello HN! I found that picking out plausible but diverse skin tones for my digital art and game development projects was kind of difficult, and I got curious about if there was a way to define a color space that made it easy. I've built a color picker and procedural generation algorithm based on the space as well as a bunch of other fun js features and demos throughout the page that use the equations. If you find it interesting, I have lots of explanations of how I built it and what properties the space has. The methodology might be a bit shaky, but hopefully the result is as helpful for…
Life & fun · Aug 2026 · toneyalexander.github.io
I trained a 125M-parameter transformer to autocomplete piano performances in real time (~108 notes/sec on an iPhone 15). The idea is basically GitHub Copilot or Tabnine, except instead of prompting it with code, you prompt it by playing a few notes on a MIDI piano. The model then continues what you played, entirely on-device. The app is free if anyone wants to try it. Happy to answer questions about the model, training, Core ML, or the many things that didn't work.
AI · 16d ago · simedw.com