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Show HN: Cobalt, an SDK to build apps for Kobo eReaders

https://github.com/BandarLabs/Cobalt
5•thepoet•4h ago
Hey HN,

I built an SDK to help me create apps I wanted on my Kobo. My Kobo device has a single core <1GHz processor and 512MB RAM, much less than a Raspberry Pi, but the eInk display and larger battery life opens up a lot of use cases.

I have since used it to build an approval sidekick for my Mac's Claude code and codex, a Hacker News Client for Kobo, a Gutenberg reader, an RSS search and reader and more. All the code is in the repo.

If you have a different device than mine (Clara BW) would love for you to test it on your device and submit a PR to enable this for more device profiles.

Thanks.

Show HN: Bor – Open-source policy management for Linux desktops

https://getbor.dev/blog/2026-08-02-bor-v080-release/
35•eniac111•2h ago•5 comments

Show HN: Syncular – offline-first SQL sync with TypeScript and Rust cores

https://github.com/syncular/syncular
19•quambo•1h ago•8 comments

Show HN: I'm a 15 Year Old Wannabe Engineer, This Is a Cycloidal Gearbox I Built

https://github.com/tom-ilan/cycloidal_gearbox
181•tomilan•9h ago•51 comments

Show HN: Katharos Functional programming and CSP-style concurrency for Python

https://github.com/kamalfarahani/katharos
2•kamalf•54m ago•1 comments

Show HN: CaLLMar – play a text-based adventure game in an LLM chat

https://github.com/lascauje/callmar
2•lascauje•54m ago•0 comments

Show HN: Documan – AI Powered Requirement Management Workspace

https://github.com/bbayer/DocuMan
2•bbayer•1h ago•0 comments

Show HN: We made Arcad, a parametric CAD in the browser, free and no signup

https://app.arcad.studio/
3•steinvakt2•1h ago•2 comments

Show HN: Logan Basic v2.1 - An online BASIC interpreter.

https://sinusoft.com/loganbasic/
10•Sinusoid314•2d ago•3 comments

SHOW HN: Substantial update to UK train mapping

https://trainmap.co.uk/map.html
2•optionalltd•1h ago•0 comments

Show HN: 8bit/cnlibs – 8bit Shadcn component library

https://8bit.cnlibs.com/
2•samke-•1h ago•0 comments

Show HN: Elevators

https://john.fun/elevators
1598•Jrh0203•1d ago•395 comments

Show HN: Btfy – a blockchain that uses weather observations

https://github.com/kotagit75/btfy
4•yuzu_mikan•4h ago•1 comments

Show HN: Aevros .... A kernel that explains itself

https://github.com/Mobeen0119/Aevros
2•Mobeen0119•3h ago•0 comments

Show HN: I built a personal CRM that lives inside Apple's Contacts app

https://www.persodex.com
4•poolie•3h ago•0 comments

Show HN: TamedTable, AI ETL in Natural Language

https://www.tamedtable.com/
3•ZeljkoS•3h ago•4 comments

Show HN: Galda – Come back to Claude Code/Codex without digging through Git

https://galda.app/
2•masa1992•4h ago•0 comments

Show HN: I worked on a new browser for 2 years, today it passed Acid 3

https://code.intellios.ai/cwbrowser/
141•coolwulf•1d ago•43 comments

Show HN: Cobalt, an SDK to build apps for Kobo eReaders

https://github.com/BandarLabs/Cobalt
5•thepoet•4h ago•0 comments

Show HN: Run multiple Claude desktop accounts in isolated windows (Mac/Windows)

https://deckspace.dev/claude-accounts/
2•sami_builds•5h ago•0 comments

Show HN: Rotating torus in terminal (but with kitty graphics protocol)

https://andreadimatteo.com/torus-v0-5.html
3•deotman•5h ago•0 comments

Show HN: Legionlinuxtui – Control Lenovo legion laptops in the terminal

https://github.com/nooneknowspeter/legionlinuxtui
16•nooneknowspeter•3d ago•0 comments

Show HN: What should the GUI for AI agents look like?

https://marbleos.com/demo
134•akbabu•2d ago•77 comments

Show HN: Vein, a minimalist open-source resource management game

https://d2ykijtrvb890q.cloudfront.net/
2•thevahidal•1h ago•1 comments

Show HN: Copy any website pixel perfect

https://github.com/HarKro753/claude-copy
7•Harro123•14h ago•10 comments

Show HN: Gander, an Android file viewer that asks for no permissions

https://github.com/mokshablr/gander
206•mokshablr•2d ago•74 comments

Show HN: Minimal LLM Post-Training Experiments on an 8GB GPU (SFT, DPO, GRPO)

https://github.com/pochenai/nano-llm-posttraining
21•popopanda•23h ago•0 comments

Show HN: CostPerPrompt – Live AI API pricing and real-workload cost calculators

https://costperprompt.com/
20•ahmed_hassan7•9h ago•7 comments

Show HN: I get 25 deep researched ideas with one single prompt

https://github.com/ringlochid/banksia
8•ringlochid•8h ago•2 comments

Show HN: Kedge – Full-stack cloud with forkable VM snapshots and global SQLite

https://kedge.dev/
136•wgjordan•3d ago•25 comments

Show HN: BitBang – Reach machines behind NAT from a browser, no account

https://github.com/richlegrand/bitbang-cli
94•narragansett•1d ago•37 comments