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Show HN: Offline-first UK train planner

Show HN: Emerging micro SaaS trends that are accelerating

Show HN: CertPulse – Certificate monitoring for multi-cloud teams

Show HN: The complete Open Library catalog in clean, analysis-ready Parquet

Show HN: Using the Web Audio API to simulate various tuning forks

Show HN: I built DoodleDuel, a free browser drawing game with an AI judge

Show HN: VeilVault – an Android password manager built to stay local

Show HN: I built the modern, clean and AI native linktree app

Show HN: Overlay map tiles onto Autodesk's 3D BIM Viewer

Show HN: Knitting – shared-memory function calls for JavaScript workers

Show HN: ProofShot – Give AI coding agents eyes to verify the UI they build

Show HN: Kern – One agent. One folder. One mind. Every channel

Show HN: Prompts Directory for Data Analyst

Show HN: Shard-based scheduling for 100x more fine-tuning experiments on 4 GPUs

Show HN: Zuhn – AI knowledge OS that compresses insights into principles

Show HN: ArXiv metadata as Parquet files (2.99M papers, 1.44GB, 417 files)

Show HN: Locro – Fast and accurate local OCR through Chrome's screen_ai

Show HN: Generate, preview, and export 3D models without complex software

Show HN: A form builder that feels like chatting

Show HN: RoverBook – PostHog for AI Agents

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