Daily issue / 2026-07-30
Useful things that surfaced in Hacker News discussions on 2026-07-30. Open the context to see why each one caught our attention—or jump straight to the original thread.
What we found
An open-source Mac engine that streams Gemma 4 experts from storage to minimize RAM use.
Source discussion: Show HN: Open-source engine running Gemma 4 26B in 2 GB RAM on any M-series Mac
“Ran this on a 64 GB M4 Max MacBook.”
pwython · recommendation · first hand use
Direct HN comment
A Firefox extension that finds Hacker News discussions for the page currently being read.
Source discussion: Show HN: I was tired of opening 2 tabs for every HN link, so I made a userscript
“Using Bloom filters means that there are no external requests unless you actually press the button.”
jstrieb · recommendation
Direct HN comment
A self-hostable book-library service with KOReader sync for progress and annotations.
Source discussion: KOReader
“BookOrbit: It provides a plugin for KOReader that syncs your progress, annotations, etc.”
joshstrange · recommendation · first hand use
Direct HN comment
A lightweight macOS reader for EPUB and PDF files.
Source discussion: KOReader
“Murasaki [1] is the most performant and sleek ebook reader you can get for MacOS currently.”
carlosjobim · recommendation
Direct HN comment
An Android ebook reader available in a full version through F-Droid.
Source discussion: More Tailscale tricks for your jailbroken Kindle
“A similarly awesome ebook reader on Android is Librera.”
dizhn · recommendation
Direct HN comment
A fantasy workstation for making and sharing small software, music, and visual tools.
Source discussion: User Interfaces of the Demo Scene
“If you're interested or nostalgic for these types of UIs, I would strongly recommend Picotron[0].”
aquova · recommendation
Direct HN comment
An open-source RAW photo editor with frequent releases and an active maintainer.
Source discussion: Darktable
“I'm currently starting to love RapidRAW”
qurren · recommendation · first hand use
Direct HN comment
An adaptive math-learning platform centered on structured practice and progress tracking.
Source discussion: LearnVector – Andrew Ng's AI company building one‑to‑one learning experiences
“After a quick look I signed up and it is fantastic - exactly what I wanted.”
Douger · recommendation · first hand use
Direct HN comment
A Claude skill that tutors through document-led Socratic questions rather than immediate answers.
Source discussion: LearnVector – Andrew Ng's AI company building one‑to‑one learning experiences
“I’ve found this to be fantastic.”
genghisjahn · recommendation · first hand use
Direct HN comment
A local Markdown note app designed for shared use by people and coding agents.
Source discussion: Hubble: Open-source notetaking app for you and your agents
“I’ve been waiting for an app like this to be developed!”
shreddude · recommendation · first hand use
Direct HN comment
A Kimi coding model offering a 256k-token context window.
Source discussion: Kimi K3-256k
“I have been using Kimi for months.”
zorked · recommendation · first hand use
Direct HN comment