1. Show HN: A Music-Reading Trainer (parkscomputing.com)
Practise reading music by naming each note of a score as the cursor reaches it
3. Show HN: Firmenza – An AI employee for SAM.gov (firmenza.com)
Firmenza's AI employee watches your SAM.gov registration and finds federal contracts that fit your business. Registration in SAM.gov is free at sam.gov.
4. Show HN: Crowd Supply – GoFundMe for hardware development (www.crowdsupply.com)
Bringing original, useful, respectful open hardware into existence.
5. Show HN: Reelbird, an open-source Loom and Screen Studio alternative for macOS (github.com)
Free, open-source screen recorder for macOS. A share link the moment you stop, then auto-zoom, smooth cursor and captions under the same link. Native Swift, your own S3/R2 bucket, CLI and MCP serve...
6. Show HN: Brian2 Atlas, a Rust engine for distributed neural simulation (next-brain.ai)
Brian2 Atlas is an open-source engine for neural simulation and native training. Explore AtlasIR, CPU, GPU, browser and MPI execution, research results and the source installation guide.
8. Show HN: Termexo – one AI operating your other coding agents, on Windows (github.com)
Windows workbench for Claude Code, Codex, OpenCode, Antigravity & Grok Build. See which agent needs you, resume sessions, and reconnect from your phone. - gemron/Termexo
9. Show HN: We built an open source, agent-first, alternative to Profound (github.com)
Agent-first AI SEO (AEO/GEO) operating platform. Contribute to Canonry/canonry development by creating an account on GitHub.
10. Show HN: Monitoring my 'dumb' boiler with AI (ndroo.github.io)
11. Show HN: Landed Cost Kit – landed cost and tariff what-ifs per SKU (landedcostkit.com)
Work out landed cost per unit for every SKU in a shipment, split freight fairly, and see how a tariff change moves your margin and the price you need.
12. Show HN: Sufuku – Sudoku, but Numbers Repeat (crossnum.com)
Each number appears as many times as its value. One puzzle a day.
13. Show HN: Heldkeys, see which credentials your AI coding agent can reach (github.com)
Which keys is your agent holding? Lists the credentials an AI agent can reach on your laptop, in a sandbox, or in CI, and flags risky AI agent steps in GitHub workflows. - hugomn/heldkeys
14. Show HN: AegisKernel – Zero-trust deterministic security runtime for AI agents (github.com)
Zero-Trust Deterministic Security Runtime for Autonomous AI Agents - adikshatriyag-crypto/aegis-kernel
15. Show HN: Pdf2epub – free PDF to ePub converter with real chapters (epub.ftak.net)
Free PDF to EPUB with real chapters and TOC for Kindle/Kobo/Apple Books. Text PDFs, no signup, files deleted after download.
16. Show HN: Katalog – a fast local music library app for Mac (91k tracks in ~1s) (musickatalog.com)
What iTunes would be, if it had kept going. For collections too large for any player.
18. Show HN: Continuous Trunk Builds of Network Ups Tools (Nut) for Fedora/EL (copr.fedorainfracloud.org)
19. Show HN: Lobby Domains: Find Domains with Chrome's On-Device AI (lobby.domains)
Find a name for your next idea. Generate locally with Chrome AI and check domain registrations as suggestions arrive. Free to use, with no account required.
20. Show HN: Kitaphone – Call mobile phones and landlines directly from the browser (kitaphone.com)
Call mobiles and landlines in 180 destinations straight from your browser. No SIM, no app install - pay-as-you-go rates and your own phone number.
21. Show HN: Beeline Multiplayer Agent Harness (usebeeline.app)
Beeline is team messaging for agents and humans: one Room where your people and your coding agents talk, hand off work, and ship it.
22. Show HN: MadMoon Shield – single-server DDoS defense, no CDN. Round 3 live (challenge.madmoonsecurity.com)
Cybersecurity assessments, penetration testing, and PIPEDA compliance for small and mid-sized businesses in Kamloops and the Thompson-Okanagan.