Today’s selection includes wiring design, publishing, math tools and small browser utilities. Each project was submitted to Show HN during the 24 hours from October 21, 2026 at 02:00 UTC to October 22 at 02:00 UTC (October 20 at 7 p.m. to October 21 at 7 p.m. Pacific).
We checked the latest Show HN list, original submission records through the official API and linked websites. Recently collected domains were excluded, and ten eligible projects fit the window without an extension. Submission time does not establish when a website first launched. These are introductions based on public information rather than completed hands-on tests.
1. HarnessHive: Keep wiring diagrams and build documents aligned
HarnessHive provides browser-based wiring-harness design with linked schematic, routing, bill-of-materials and formboard views. Its site describes collaborative editing and exports to spreadsheets and full-size drawings. Harness engineers can inspect a shared model instead of maintaining disconnected drawings and parts lists.
Before you try it: Access begins with a time-limited trial. Export scale, conductor choices and derived quantities need engineering checks before manufacturing. We reviewed the product information without creating a harness or validating a physical build.
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2. Bloffy: Write a hosted blog with control over its markup
Bloffy combines a Markdown and HTML editor with custom CSS, multiple blogs and workspace permissions. Writers who want a hosted service while retaining control over page structure can inspect its split editor and preview, themes and domain options. The site also describes multilingual publishing and optional analytics choices.
Before you try it: Custom scripts, media and styling can change performance and accessibility. The maker’s PageSpeed results are examples, not guarantees for every blog; we did not create a site or reproduce those scores.
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3. ZeGrapher v4: Explore functions, sequences and data visually
ZeGrapher is an open-source desktop math plotter for functions, recurrence sequences, parametric curves and imported data. Shared constants can animate a family of curves, and exports include vector formats with a specified physical size. Students and technical writers can inspect the examples when preparing explanatory graphs.
Before you try it: This submission concerns a new version of a longstanding project, not a newly launched website. The maker calls the release a candidate with fixes still needed. We did not install it or validate numerical results and large-file performance.
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4. Powderworks: Use maintained grammars for code analysis
Powderworks offers Tree-sitter-compatible WebAssembly grammars organized by language version and dialect. The official page provides a Python sample and explains how existing queries and bindings can work with its parsers. Teams building linters or analysis tools can evaluate whether maintained grammar releases reduce their own patching work.
Before you try it: The full library is a commercial offering, and language coverage is finite. Test compatibility with the exact syntax and queries your tool uses. We reviewed the sample and documentation without integrating a parser or verifying security-analysis accuracy.
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5. Quizingo Anagrams: Solve a shared daily word board
Quizingo’s Anagrams page describes daily scrambled-word grids in several sizes. Players use letter tiles or a keyboard, can shuffle the letter bank and must answer within the timer. Word-game fans can compare the same day’s board with friends or skip a stubborn word to continue.
Before you try it: Skipping forfeits that word, and the maker notes that the interface is still being refined. We reviewed the instructions rather than completing a board; claims about learning benefits were not evaluated.
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6. LightScroll: Add a deliberate pause before distracting apps
LightScroll lets iOS and Mac users choose apps or websites, define allowed sessions and add friction before access. Its documentation describes short waits, mini-games and optional accountability codes for overrides. People who repeatedly open distractions during short breaks can inspect how strict or flexible those controls can be.
Before you try it: Feature access and behavior depend on platform and configuration. A pause is not a guarantee of better focus, and overrides intentionally remain possible. We did not install the app or measure changes in screen time.
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7. Lasso: Annotate a live screen before capturing it
Lasso adds a temporary drawing surface over Mac applications so users can circle, highlight or point at details while explaining them. Its site describes capturing the annotated screen and dragging the result into a message or agent conversation. Presenters and people reviewing interfaces can inspect a draw-first workflow rather than editing a screenshot afterward.
Before you try it: It requires macOS 14 or later. Review the entire captured screen before sharing it, since annotations do not hide unrelated information. We did not install the app or send screenshots to another service.
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8. Word Press Function Trivia: Quiz yourself on WordPress function descriptions
Word Press Function Trivia presents a function name alongside multiple possible descriptions and a running score. The loaded page offers a small, focused quiz rather than a full course. WordPress developers can use it as a quick prompt to recall familiar APIs or identify names they should look up.
Before you try it: A trivia answer is not a substitute for current API documentation. The inspected question included a legacy function name, so check availability and deprecation before using a remembered function in code. We did not audit the complete question bank.
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9. Slidum: Share an HTML slide deck through a browser link
Slidum turns HTML presentations into hosted links with slide navigation, thumbnails and full-screen playback. The service describes public sharing, email invitations and a library for organizing decks. People generating presentations with AI can inspect a player that gives recipients a browser experience instead of a downloaded HTML file.
Before you try it: The free plan limits the number of presentations, and access settings deserve review before sharing. The provider describes sandboxed playback; we did not audit that isolation or upload a deck. Compatibility should be checked with the actual presentation.
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10. RMBG: Remove an image background in the browser
RMBG offers background removal with local browser inference, editing controls and full-resolution exports. Its public interface supports several input formats, transparent PNG output and batch processing. Designers can inspect it as an option for preparing cutouts while the maker says image pixels remain on the device.
Before you try it: The first visit downloads model files, and performance depends on browser capabilities and hardware. Fine edges can need manual correction. The maker discloses limited event analytics; we did not upload an image or audit network behavior.
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Today’s domain list
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harnesshive.com bloffy.co zegrapher.com powderworks.dev www.quizingo.app www.lightscroll.app www.trylasso.online wordpress.greg.technology slidum.com velmet44.github.io
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