Vertical SaaS plays
- LastShelf: Emergency document and contact map for families. HN (47pt)
- Devthropology: Analytics and insights layer on top of GitHub repos. HN (37pt)
- AccessLumens: Research tool surfacing ADA accessibility failures on US city websites. HN (21pt)
- Hnwork.app: Cleaner UI for Hacker News hiring posts. HN (25pt)
- Freeport: Peer-to-peer ride-hailing marketplace built on Nostr. HN (67pt)
Niche dev tools
- Colibri: Tool for running GLM 5.2 on low-spec hardware. HN (846pt)
- KiCad in the Browser: Browser port of the open-source PCB design tool KiCad. HN (110pt)
- Pulpie: Pareto-optimal models for cleaning and normalizing web data. HN (104pt)
- Runloom: Go-style coroutines for Python free-threaded mode. HN (44pt)
- Arcaide: Code exploration tool using multi-level call graphs. HN (25pt)
- Onboard-CLI: LLM-powered, AST-based codebase visualization tool. HN (24pt)
- Frugon: Local tool that identifies which LLM calls a cheaper model could handle. HN (57pt)
- Docx-CLI: CLI tool letting agents read and edit Word documents with fewer tokens. HN (70pt)
- L9gpu: GPU telemetry tied to individual Kubernetes pods or Slurm jobs. HN (20pt)
- PostgreSQL performance benchmarks: Performance and cost comparison across 23 EC2 instance types. HN (97pt)
- Whim Files: Fast, native Mac file manager with fuzzy find and no Electron dependency. HN (98pt)
- Davit: Native UI for Apple Containers. HN (387pt)
- Flint: Microsoft's visualization language designed for AI agents. HN (344pt)
- Requirements Engineering with Formal Verification: Formal verification layered onto requirements engineering workflows. HN (27pt)
- LangGraph for Swift: Port of the LangGraph agent orchestration framework to Swift. HN (25pt)
- Free Mermaid Diagram Editor: Browser-based editor for Mermaid diagrams with no dependencies. HN (51pt)
- Otari: Open-source LLM control plane from Mozilla AI. HN (20pt)
Consumer and utility apps
- 18 Words: Short-form creative writing tool limited to 18 words. HN (1093pt)
- Analog Watch: Minimalist analog watch product. HN (102pt)
- Yamanote.fun: Full soundscape recreation of Tokyo's Yamanote train line. HN (236pt)
- Follow London Trains in 3D: 3D real-time tracker for London train positions. HN (154pt)
- Homegames: Open-source indie game platform in development for eight years. HN (229pt)
- Neil the Seal Game: Browser game built around the Neil the Seal character. HN (97pt)
- Chiptune Radio: Streaming radio station for chiptune music. HN (77pt)
- Wyrm: Touch-based algebra solver built on an open-source soundness engine. HN (73pt)
- RandoFont: Discovery browser for Google Fonts. HN (24pt)
- Tomesphere: Interactive atlas mapping 8.5 million research papers. HN (78pt)
- InstantVideos.org: Short auto-generated documentaries roughly 30 seconds long. HN (26pt)
- Paint the Earth: Collaborative art tool painted onto a live interactive globe. HN (20pt)
- Rubiks Cube Solver: Browser-based Rubik's Cube solver. HN (23pt)
- Cooked House FPS: Parent-and-child-built first-person shooter as an alternative to Roblox. HN (23pt)
- Fading Maize: AI-assisted revival of a 2001 college band's recordings. HN (53pt)
AI agents and infra
- Rowboat: Open-source, local-first alternative to Claude Desktop. HN (217pt)
- FableCut: Browser video editor that AI agents can drive, with zero dependencies. HN (95pt)
- Reverse-engineering web apps into agent tools: Tool that converts existing web apps into callable agent tools. HN (81pt)
- MakerChecker: Scanner that audits AI agents for dangerous capabilities. HN (44pt)
- Fortress: Stealth Chromium browser built so agents avoid bot detection. HN (43pt)
- Halo: Open-source, tamper-evident runtime evidence logger for AI agents. HN (37pt)
- Agent Draw: Agent that draws on a canvas while the user talks, built on TLDraw. HN (36pt)
- Shellular: Mobile shell for running Claude Code, Codex, and Pi from a phone. HN (33pt)
- Kastor: Terraform-style declarative specs for AI agents. HN (33pt)
- Lucid: Web tool for viewing and editing an AI model's reasoning before it answers. HN (33pt)
- Abralo: Multi-agent Claude Code session manager in a single window. HN (32pt)
- LLM Thought Visualization: Tool that renders the internal thought steps of an LLM. HN (24pt)
- Cerast Intelligence OSINT: OSINT tool that finds exposed files across domains. HN (58pt)
Other notable launches
- Devthropology: GitHub repo analytics aimed at engineering teams. HN (37pt)
- Fizzbee: Requirements engineering tool with formal verification. HN (27pt)
The dominant wedge this week is AI agent infrastructure: safety auditing, browser stealth, declarative specs, and runtime evidence are all being bolted onto agent workflows that were previously ungoverned. A second clear pattern is the browser-native port play, where established desktop tools (KiCad, Claude Desktop, file managers) get reimplemented in the browser or as lightweight native apps to remove Electron or installation friction. Founders should also watch the LLM cost-routing category, with tools like Frugon pointing toward a coming wave of spend-optimization middleware that sits between applications and model providers.