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Alternatives

Products that do what Sirenfall, a civil defense siren synthesized in Web Audio does

SIRENFALL: a free browser scene, a shelter overlooking a rainy city. Pull the breaker to power a civil-defense siren synthesized live in Web Audio.

  1. 1WO

    Hey HN! Braden here, creator of Whispering, an open-source speech-to-text app. I really like dictation. For years, I relied on transcription tools that were almost good, but they were all closed-source. Even a lot of them that claimed to be “local” or “on-device” were still black boxes that left me wondering where my audio really went. So I built Whispering. It’s open-source, local-first, and most importantly, transparent with your data. Your data is stored locally on your device, and your audio goes directly from your machine to a local provider (Whisper C++, Speaches, etc.) or your chosen…

    2025 · github.com

  2. 2WA

    Hi, I'm the author of this little Web Audio toy which does physical modeling synthesis using a simple spring-mass system. My current area of research is in sparse, event-based encodings of musical audio (https://blog.cochlea.xyz/sparse-interpretable-audio-codec-pa...). I'm very interested in decomposing audio signals into a description of the "system" (e.g., room, instrument, vocal tract, etc.) and a sparse "control signal" which describes how and when energy is injected into that system. This toy was a great way to start learning about physical modeling synthesis, which seems…

    2025 · blog.cochlea.xyz

  3. 3

    Convert text to speech with natural voices free online

    2024

  4. 4SN

    After reading "During Helene, I Just Wanted a Plain Text Website" on Sparkbox (https://news.ycombinator.com/item?id=46494734) , I built safe-now.live – a text-first emergency info site for USA and Canada. No JavaScript, no images, under 10KB. Pulls live FEMA disasters, NWS alerts, weather, and local resources. This is my first live website ever so looking for critical feedback on the website. Please feel free to look around. https://safe-now.live

    Feb 2026 · safe-now.live

  5. 5
    Heard310

    Give Claude Code and Codex a voice

    Jul 2026 · heard.dev

  6. 6

    Make your Mac rain

    2024

  7. 7
    Serenade218

    Write code using natural speech

    2020

  8. 8

    Perfectly transcribed, every time - 100% free

    2023

  9. 9

    Open source, free, local debugger for AI agents

    May 2026 · raindrop.ai

  10. 10

    Fast & Affordable Text-to-Speech API

    2025

  11. 11
    Wave310

    Turn your voice into text — local or cloud, your choice

    Jun 2026 · wave.mxv.sh

  12. 12

    Free ultra realistic text to speech for voiceover projects

    2020

  13. 13AR

    I built this because most Pomodoro timers felt too sterile. I wanted something that actually pulls you in with rain, brown noise, soft ASMR, and a few Middle Eastern tracks. Added animated backgrounds so it’s not just a blank screen. Runs fully in your browser. No accounts, no tracking, just open it and focus. If you give it a try or have ideas to make it better, I’d love to hear.

    2025 · forgetoolz.com

  14. 14

    Open-source, local-first dictation you can trust

    2025

  15. 15OS

    A couple of months ago, I built this app to help identify people stuck under rubble. First responders have awesome tools. But in tough situations, even common folks need to help. After what happened in Myanmar, we need something like this that works properly. It has only been tested in controlled environments. It can also be improved; I know BLE is not _that_ effective under rubble. If you have any feedback or can contribute, don't hold back.

    2025 · github.com

  16. 16
    Wavepot147

    Code to make music

    2014

  17. 17

    Turn source text into editable multi-voice scripts

    Jun 2026 · apps.apple.com

  18. 18WA
  19. 19

    Make anything an audiobook or podcast

    2025

  20. 20

    Simple & cheap log alerting

    2024

  21. 21

    Cyber-Mexica dub siren with ancient instruments

    Jun 2026 · dub-siren-mexica-397739234410.us-east1.run.app

  22. 22CF

    2012 · coding.fm

  23. 23

    The most powerful voice coding experience.

    2020

  24. 24

    Ambient sounds to wash away distraction.

    2014

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