Show - HN Paper

Show HN: Hashful storage. Store your whole file in the URL hash

Show HN: Made an app to help you market your app on TikTok

Show HN: Mathfinity – Mental arithmetic drills against the clock (Flutter)

Show HN: Any photos into Amazon-compliant main images

Show HN: Gymnasium RL Environments in Julia

Show HN: Kamal-backup – Rails backups with restore drills and audit evidence

Show HN: Got tired of paying $100/mo for SEO tools, so I built an alternative

Show HN: I Built a Polyfill for the Browser's New Language Detection API

Show HN: Dittongo: The Shape Shifting App

Show HN: Claude Relay – local Claude Code sessions message each other

Show HN: I built Pagome – SEPA payment links via GiroCode QR (free, no server)

Show HN: Memex, Claude memory via local RAG (MCP, offline embeddings)

Show HN: Quadium 4004 – A visual laboratory for the Intel MCS-4 architecture

Show HN: Brainio – Markdown notepad that turns notes into visual mind maps

Show HN: SongShift, an advanced, AI-powered song conversion service

Show HN: Retroguard – Verifiably secure AI guardrails

Show HN: A minimalist personal homepage I designed from scratch

Show HN: A tiny C program where an LLM rewires its DAG while running

Show HN: Kanban-CLI – a web UI for local Markdown todo lists

Show HN: I built a native macOS audio player and it changed my life

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