Vertical SaaS plays
- Doub.ly (pub.doub.ly): Helps musicians check whether they have a share of $656M in unclaimed royalties at The MLC. HN | 76 pts
- Bribes.fyi: Compares bribery statistics by government department, a civic-transparency data tool. HN | 55 pts
- Zoneless: Open-source alternative to Stripe Connect for split-payment workflows. HN | 81 pts
- Why You Lost: Post-match performance autopsy tool built specifically for Dota 2. HN | 20 pts
- Tesana: An AI game engine positioned to generate playable games end-to-end. HN | 16 pts
Niche dev tools
- Openleetcode: Local LeetCode runner that keeps tests inside the repo rather than on a remote platform. HN | 73 pts
- Saggar: Mac terminal that organizes sessions and focus for developers. HN | 70 pts
- Shoehorn: Quantizes any model down to fit available local hardware. HN | 85 pts
- Proliferate: Self-hostable, open-source Codex-style environment for any coding agent. HN | 39 pts
- Frugal Tokens: Dashboard for tracking token costs and usage across multiple coding agents. HN | 37 pts
- WaveHouse: Supabase-style backend layer built on top of ClickHouse. HN | 18 pts
- ParqDB: Runs vector search in the browser directly from Parquet files served over HTTP. HN | 24 pts
- Avouch: Free, locally running AI code reviewer as a drop-in for paid services. HN | 22 pts
- PyScrappy: Self-healing web scraping selectors paired with an MCP server. HN | 22 pts
- jit (jitpass): Addresses plaintext secrets still sitting on developer laptops. HN | 55 pts
- Visimer: Open-source visual editor for Mermaid diagrams. HN | 17 pts
Consumer / utility apps
- MIDI Autocomplete (simedw): A 125M on-device model that autocompletes piano playing in real time. HN | 579 pts
- Desktopcolors.com: Museum-style archive of solid background colors from classic operating systems. HN | 166 pts
- Mic Drop: Real-time multiplayer karaoke game playable in the browser. HN | 92 pts
- Learn Flags Quiz: Simple flag-identification quiz app. HN | 57 pts
- 1667: Terminal UI for writing fiction with language model assistance. HN | 37 pts
- Omacosy: Omarchy-style tiling window manager for macOS that requires no SIP disable. HN | 56 pts
- Lucasartsifier: Auto-detects and patches walking-dead states in Sierra adventure games. HN | 159 pts
AI agents and infra
- Huzzah: A novel interface approach to coding alongside AI, rethinking the editor interaction model. HN | 369 pts
- OzBrain: Shared knowledge layer that bridges AI agents and human team members. HN | 65 pts
- Wildstatic: A public AI with a single shared memory state across all users simultaneously. HN | 86 pts
- ModelMap (modelmap.cc): Generates interactive, animated architecture visualizations for any HuggingFace model. HN | 113 pts
- AgentSight: eBPF-based observability for AI agents that requires zero code changes. HN | 15 pts
- Grafana agento11y-hermes: Grafana-agent observability integration for the Hermes agent runtime. HN | 28 pts
- Agent-shell: Vendor-neutral Emacs interface for chatting with AI agents. HN | 28 pts
- Waku: Native Rust and GPUI desktop app built specifically for coding agents. HN | 39 pts
Other notable launches
- Sokoban AI Solver: Demonstrates a classical planning AI solving Sokoban puzzles in the browser. HN | 72 pts
- Quasicrystals Playground: WebXR animation sandbox for quasicrystal patterns. HN | 40 pts
- CCTV Camera Database: Data viewer for selecting Frigate-compatible IP cameras. HN | 48 pts
- Lips Scheme 1.0.0-beta.22: JavaScript Scheme implementation with full continuations and tail-call optimization. HN | 20 pts
- statuslin.es: Community library of Claude Code status-line configurations. HN | 13 pts
Three wedge patterns stand out this week. First, AI agent observability is becoming its own infrastructure category, with multiple teams building monitoring layers (eBPF-based, Grafana-native, cost dashboards) on top of the same underlying agent runtimes, which signals an opening for a consolidated observability platform targeting agent developers. Second, music-industry fintech is underserved, and a tool that recovers unclaimed royalties with minimal friction shows how pairing a public dataset with a clean UI can own a vertical niche almost immediately. Third, the on-device model tooling cluster (quantization helpers, local runners, shrunk weights) points to a growing wedge around making frontier models usable without cloud spend, a theme that rewards founders who can abstract the complexity into a one-click workflow.