Vertical SaaS plays
- CheapFoodMap: A map of good meals under $10 in any city. HN (280 pts)
- CheapSecurity: Lightweight, self-hosted CCTV for Linux single-board computers. HN (138 pts)
- Kedge: Full-stack cloud with forkable VM snapshots and global SQLite. HN (132 pts)
- Let's Seal: Let's Encrypt for document signing, free and self-hosted. HN (94 pts)
- Bribes.fyi: A know-before-you-go guide to corruption risk by location. HN (77 pts)
- Golf Course Browser: A map of every US golf course. HN (222 pts)
Niche dev tools
- XY: A fast, composable, GPU-accelerated interactive plotting library. HN (135 pts)
- FeyNoBg: Automatic background removal model and training library. HN (121 pts)
- Verified 3D CSG: Formally verified 3D constructive solid geometry in 93 lines of spec. HN (115 pts)
- Writemark: A dependency-free web component for inline Markdown editing. HN (53 pts)
- Ctrlb-decompose: Strips noise from logs before sending them to LLMs. HN (49 pts)
- Supapool: Provisions a Supabase instance per coding agent in about 400 ms. HN (30 pts)
- Claude-account: Switches Claude Code accounts without re-logging in. HN (54 pts)
- Trylle: A next-generation Git platform for modern teams. HN (21 pts)
- Dowe: A full-stack language targeting server, web, desktop, Android, and iOS. HN (20 pts)
Consumer and utility apps
- HNewhere userscript: A userscript that combines HN links and the linked page into one tab. HN (427 pts)
- Brolly: A plain-text weather forecast site. HN (227 pts)
- Gander: An Android file viewer that requests no permissions. HN (200 pts)
- Flashpaper: Self-destructing secret sharing with no database required. HN (25 pts)
- tale.fyi: A home for fiction where readers can read or listen from a single link. HN (72 pts)
- SpinWin: A macOS menu bar app that visually rotates or spins any window. HN (37 pts)
- Echologue: A private AI voice journal. HN (29 pts)
AI agents and infra
- Turbo-fieldfare: Open-source engine running Gemma 4 26B in 2 GB RAM on M-series Macs. HN (901 pts)
- Yap: Open-source on-device voice dictation for macOS with no model download needed. HN (104 pts)
- Qwen Scribe: Local transcription and dictation for Apple Silicon. HN (94 pts)
- Bullshit Detector: Agent skills that fact-check videos and articles. HN (65 pts)
- Segue: Saves context from one AI and loads it in another via a short handle. HN (31 pts)
- Claude Code merge queue: A local merge queue for parallel Claude Code agents. HN (42 pts)
- OpenLake: Cuts long-horizon inference costs by 50 percent via external KV cache offload. HN (22 pts)
- Marble OS demo: A proposed GUI paradigm for AI agents. HN (112 pts)
- World Model Optimizer: Optimizes and serves models at half the cost of comparable quality. HN (71 pts)
Other notable launches
- Reverse Minesweeper: A game inverting the classic Minesweeper mechanic. HN (262 pts)
- Chipbuilder: A game where players build a CPU from logic gates. HN (93 pts)
- Vimgolf.ai: Learn Vim by playing through a map of levels. HN (35 pts)
- Manim in the browser: 3Blue1Brown's animation engine running via WebGPU. HN (48 pts)
- Rescript: An open-source alternative to Descript built in a weekend. HN (39 pts)
- BitBang: Reaches machines behind NAT from a browser with no account needed. HN (80 pts)
- Federalist Reader: The Federalist Papers typeset as the 1787 newspapers they ran in. HN (51 pts)
Three wedge themes stand out this week. First, on-device AI inference is becoming a real wedge, with multiple teams shipping local voice, transcription, and LLM tools for Apple Silicon at near-zero marginal cost, a pattern that undercuts every hosted transcription and dictation SaaS. Second, the "Cheap X" template is proving durable: mapping cheap food, self-hosted cheap CCTV, and free document signing all follow the same formula of taking a paid vertical and rebuilding it for cost-conscious or self-hosting users. Third, AI agent tooling is fragmenting fast, with founders building merge queues, context bridges, and GUI paradigms specifically for multi-agent coding workflows, a category that barely existed twelve months ago.