Life & fun · September 5, 2026
GreenTechStack
Where best tools for sustainability and ESG got discovered.
What it does
GreenTechStack is a leading sustainability tech tools directory for ESG reporting and compliance, carbon accounting, climate intelligence, nature and biodiversity, life-cycle assessment, circular economy, supply-chain sustainability, and related use cases. Sustainability professionals and organizations can explore structured categories, tags, and detailed product profiles. Makers, startups, and technology providers can submit products and showcase them to a focused sustainability audience.
Launch, discover and compare sustainability tech tools for ESG reporting, carbon accounting, climate risk, biodiversity, LCA, supply chains and more.
Sweep is an enterprise sustainability platform that helps companies track, report, and act on their ESG data and carbon emissions to drive business performance. A universal sustainability ratings and intelligence suite to confidently manage value chain risk, compliance, and Scope 3 carbon emissions. Diligent ESG is a comprehensive platform that simplifies carbon calculations, automates ESG reporting, and centralizes stakeholder surveys. Novisto's sustainability management software empowers global enterprises to create value from their ESG strategy, data, and reporting. Watershed is an enterprise sustainability AI platform that helps companies manage sustainability data, meet reporting…from greentechstack.com
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Life & fun · 10d ago · louisabraham.github.io
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Life & fun · 28d ago · photosynthesis.camera
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Life & fun · 28d ago · solouno.io
Scroll through all 43,252,003,274,489,856,000 reachable Rubik's Cube permutations.
Life & fun · 26d ago · everycube.alen.is
Hi HN, I built Eigendrum, a web tool that solves the 2D wave equation for arbitrary shapes so you can hear what they sound like as drums. How it works: * Solves -∇²u = λu using finite element analysis (Kφ = λMφ) on a triangle mesh. * Validated to <0.1% error against closed-form solutions for circles (Bessel zeros) and rectangles. * Sound model factors in strike location, Rayleigh damping, and mallet width. * Includes Kac drums I & II to demonstrate identical sound spectra from different geometries. * No frameworks, build steps, or dependencies. Repo and tests:…
Life & fun · 27d ago · baselashraf81.github.io
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OpenTrailPaper is open-source bike computer firmware for the LilyGO T5S3 4.7" E-Paper PRO. It supports offline maps, GPX routes, FIT recording and Bluetooth sensors.
Dev tools · 2d ago · opentrailpaper.com
Run Qwen3.8-Flash-Next (125B MoE, 104 GB at 4-bit) on Macs with a fraction of that RAM by streaming experts from SSD. MLX + Swift, Ollama-compatible API. - carloslfu/slotstream
Dev tools · 5d ago · github.com
NPC-Forge is a framework for building conversational agents that run on the CPU without relying on machine learning or LLMs. - NPC-Forge/docs/development.md at main · gioblu/NPC-Forge
AI · 2d ago · github.com
Weedout is a Safari extension that filters out videos YouTube labels as “Made with AI”.
AI · 4d ago · masteranza.github.io
Find your next hire or your next role from Hacker News monthly threads. AI-powered matching between candidates and job postings.
AI · 4d ago · hnmatchmaker.com
I made OwnTime to balance between competing priorities in my life. The idea is based on two main influences: the concept of "roles" from "The 5 Choices" (2015), and my repeated failure to effectively implement time blocking due to the necessary flexibility in my role. The app allows you to define time budgets, which are not much more than a few mutually exclusive countdown timers. The UX is essentially that of a chess clock for an arbitrary number of players with configurable time. The whole point of the app is to kick you out of the running role/priority when its time is up. One…
Life & fun · 4d ago · owntime.app