Cobalt

1. act

   Run your GitHub Actions locally 🚀

   

2. AppSignal

   www.appsignal.com sponsored

   AppSignal knows why the f*#k it crashed. Stop vibe-debugging. Every exception, every backtrace, grouped so you see patterns, not noise.

   

3. 

4. open-meteo

   Free Weather Forecast API for non-commercial use

   

5. LIPS

   Scheme based powerful lisp interpreter in JavaScript

   

6. 

7. pagecord

   Blogging as easy as sending an email.

   

8. blog

   I might write stuff here sometimes (by madprops)

   

9. SaaSHub

   www.saashub.com sponsored

   SaaSHub - Software Alternatives and Reviews. SaaSHub helps you find the best software and product alternatives

   

10. IronCalc

    Main engine of the IronCalc ecosystem

    

11. patchbin

    A pastebin for patches, supercharged for git collaboration

    

12. pytrilogy

    Can we improve the best language for data analytics? Strongly typed, composable, cross-engine SQL. More declarative and expressive, safer, and simpler for humans and agents.

    

13. comedot

    Godot template and component-based framework for 2D games.

    

14. 

15. systemg

    A general-purpose program orchestrator.

    

16. go-micro

    Discontinued Go Micro is a framework for distributed systems development [Moved to: https://github.com/asim/go-micro] (by micro)

17. portr

    Expose local http, tcp or websocket connections to the public internet

    

18. preloop

    agent-native, drop-in Github Actions that can run locally or self-hosted in microvms, with debug-on-failure

    

19. alan_parsons_project

    UIUC ECE291 summer of 2002: Assembly x86: Middle Earth sky shooter. Now converted from x86 asm to WebAssembly via Claude Code in 2026

    

20. USBSID-Pico

    USBSID-Pico is a RPi Pico (RP2040/W RP2350/W) based board for interfacing one or two MOS SID chips and/or hardware SID emulators over (WEB)USB with your computer, phone, ASID supporting player or USB midi controller

    

21. jant

    A personal microblogging system as smooth as Threads and Tumblr.

    

22. magic-switch

    Magic Switch is a simple macOS menu bar utility that lets you quickly (and securely) switch Magic Keyboard, Magic Trackpad, Magic Mouse, and other Bluetooth peripherals between Macs with one click.

    

23. SaaSHub

    www.saashub.com sponsored

    SaaSHub - Software Alternatives and Reviews. SaaSHub helps you find the best software and product alternatives

    

NOTE: The number of mentions on this list indicates mentions on common posts plus user suggested alternatives. Hence, a higher number means a better Cobalt alternative or higher similarity.

Cobalt discussion

Cobalt reviews and mentions

Posts with mentions or reviews of Cobalt. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2026-08-21.

• Kobo can run apps now

  This project has an OPDS client implemented as an app example here, tested on Gutenberg's OPDS and standard eBooks. https://github.com/BandarLabs/Cobalt/tree/main/examples/gute...

• Native HN App for Kobo
• Ask HN: What Are You Working On? (August 2026)

  I have high myopia that is progressively getting worse so started working on building an app development platform for my Kobo eReader so that I can live without my mac and phone. https://github.com/BandarLabs/Cobalt

  Have built the SDK and some apps like an HN Client, ChatGPT client, Claude Code permissions sidekick, RSS Reader, some games etc. (all in the same above repo)

  It has 8x less powerful hardware than a modern raspberry pi but runs Linux with an eink display, wifi bluetooth and a good battery life for $100 or something.

• Apps for Kobo
• Devtools must be open source

  A bit idealistic for the crowd here but has some good points.

  The other day I wanted to build personal apps for my Kobo device. It has a single ~800Mhz core and 512 MB of RAM, probably eight times less than a rasbperry pi, but runs a Linux.

  I wanted to break free from watching my laptop screen for long Claude sessions partially due to degrading eyesight and have a sidekick for approvals streamed to the Kobo. Apart from the Claude and Codex permissions sidekick done via hooks, I ended up building an entire SDK, an HN client, an RSS discovery & reader and an audiobook generator using deep research and ElevenLabs API all running on it.

  Anyone using an LLM can now personalize it for their own Kobo device, which might have some nuances over my Clara BW. Significantly less work I hope than doing it all from scratch even with a coding agent.

  https://github.com/BandarLabs/Cobalt

• Show HN: An SDK to build apps for Kobo eReaders
• A note from our sponsor - AppSignal

  www.appsignal.com | 25 Aug 2026

  Stop vibe-debugging. Every exception, every backtrace, grouped so you see patterns, not noise. Learn more →