Cool Software Projects

Papel is a new research app aiming to bring the TikTok experience to the discovery of scientific papers. The black-and-white platform allows users to easily find literature and read it using on-device AI. It also includes collaborative features so researchers can discuss their work with peers.

A developer has shared a MacOS web server written exclusively in ARM64 assembly language. The project, showcased on Hacker News, was built as a personal challenge to explore extreme low-level system programming. The resulting application operates natively without relying on higher-level abstractions or traditional software frameworks.

A new Hacker News project introduces a maintained meta-index dedicated to cataloging indie web and small blog directories. The collection currently highlights 38 different index sites organized across six distinct categories to help users navigate independent online communities.

A developer has released let-go, an open-source programming language written in Go that closely mimics Clojure and boasts a remarkably fast 7-millisecond boot time. The project's source code is now available on GitHub for community contributions and further development.

A developer has released an open-source project called Rust but Lisp, which combines the syntax and paradigms of Lisp with the underlying capabilities of the Rust programming language. The source code is currently available on GitHub for community testing and collaborative development.

A new open-source project named TRUST has been shared on Hacker News for its unique approach to coding in Rust like it is 1989. Developers interested in this unconventional programming style can explore the code and contribute to the repository on GitHub.

Tilde.run is a new AI agent sandbox that unifies GitHub, S3, and Drive into a single transactional, versioned filesystem to make data operations fully auditable. The platform provides comprehensive network logging and allows developers to roll back any execution with just one command.

Hallucinopedia is a newly launched project on Hacker News that acts as an encyclopedia for a procedurally generated universe. The world and its lore do not actually exist until a user visits the site, dynamically creating the content on the fly. This interactive platform offers a unique approach to generative digital world-building and exploration.

Templatical is a newly launched open-source drag-and-drop email builder designed to serve as an alternative to commercial platforms like Beefree and Unlayer. The tool provides an interactive playground where users can build, preview, and export email templates directly within their web browser.

Airbyte has launched Airbyte Agents, a new tool designed to provide AI applications with contextual access across multiple data sources while serving as a potential MCP gateway. The release highlights the growing need to bridge the data engineering knowledge gap for AI developers, prompting the company to plan educational sessions at the upcoming AI Engineer conference.

A newly launched web tool allows users to browse, search, and filter color palettes extracted from 3000 classic paintings by Old Masters. This resource provides designers and creators with a vast library of historically inspired color combinations to incorporate into their own projects.

A new web playground allows users to generate 3D Gaussian Splats directly in their browser using Apple's SHARP model. The project runs the machine learning model entirely client-side by leveraging the ONNX runtime web. This enables developers to experience advanced rendering techniques without requiring powerful local hardware.

A new project analyzes Hacker News discussions to determine the popularity and sentiment of Large Language Models among developers. The tool works by automatically detecting models from the OpenRouter catalog and scoring community sentiment within the comment threads. Ultimately, it provides a data-driven look at which coding AI tools are currently considered state-of-the-art by the tech community.

Bruin Data has released DAC, a new open-source dashboard-as-code tool that allows users to build interactive dashboards using YAML and JSX. The platform includes a built-in semantic layer to streamline data management and visualization. It is designed for both humans and AI agents to generate standardized and easily reviewable dashboards.

A new lightweight macOS menu bar app called WhatCable allows users to instantly check the capabilities of any connected USB-C cable. The utility eliminates guesswork by explaining exactly what each cable can do in plain English. Recently shared on Hacker News, this tool helps Mac users easily navigate the confusing landscape of varying USB-C standards.

The newly launched AI CAD Harness acts as an artificial intelligence copilot specifically designed for Autodesk Fusion. Shared on Hacker News, the tool aims to streamline the 3D modeling process by integrating AI assistance directly into the designer's workflow.

A new open-source project applies Andrej Karpathy's AI development loop to the automated design of CPU architectures. The associated GitHub repository hosts a tournament to evaluate these auto-generated designs and encourages community contributions.

Rocky is an open-source SQL transformation engine built in Rust that type-checks entire data pipelines to catch breaking changes before execution. It provides advanced data management features including branching, replay, and column-level lineage, alongside adapters for major platforms like Databricks, Snowflake, BigQuery, and DuckDB. The project is released under the Apache 2.0 license as a single static binary.

Rip.so is a newly launched digital graveyard that serves as a memorial for defunct internet products and services. Highlighted on Hacker News, the site pays a nostalgic tribute to forgotten messengers, obsolete browsers, discontinued gadgets, and websites the internet forgot.

The open-source project CUA enables developers to programmatically control macOS applications in the background without disrupting the active user cursor. It aims to scale computer-use 2.0 by providing cross-OS fleets, open-source drivers, and benchmarks for AI model training and evaluation.

A new free dashboard provides live solar and lunar tracking using up to 4K NASA footage, 12 SDO wavelengths, and real-time moon phases for over 200 cities. The privacy-focused platform also features the ISS Earth feed, daily timelapses, and live space weather updates for Android and iOS without requiring a signup.

A developer has introduced Dirac, an open-source coding agent that recently topped the TerminalBench benchmark using the Gemini-3-flash-preview model. The tool leverages advanced optimizations like Hash Anchored edits and massively parallel operations to dramatically improve efficiency. This allows it to reduce API costs by up to 80% compared to other agents while simultaneously improving overall code quality.

The release of a free textbook on engineering thermodynamics has sparked discussions regarding the high costs of traditional textbook publishers and the financial realities of self-publishing. Readers praised the author for democratizing hard science education and sharing print-on-demand profit margins, while also highlighting the ongoing necessity for low-cost physical books in developing regions.

A developer has successfully transformed a photogrammetric 3D Gaussian Splat scene into a fully playable browser-based first-person shooter. Built entirely within the PlayCanvas engine, the project incorporates advanced mechanics such as collision detection, pre-baked lighting, and behavior-tree AI for non-player characters.

YC S26 startup Nex.ai has launched WUPHF, a platform enabling users to deploy collaborative teams of AI agents. These agents work together over a shared context to maintain a dynamic, Markdown and Git-based wiki inspired by Andrej Karpathy. The system is compatible with multiple popular coding tools and local large language models to streamline multi-agent workflows.

A developer has released a new home server operating system designed to make managing Linux environments more enjoyable for tech enthusiasts. By focusing on a streamlined user experience, the project aims to simplify the setup and maintenance of home servers for hobbyists.

Browser Harness is a new open-source tool that enables large language models to autonomously navigate the web and complete complex browser-based tasks. It features a self-healing architecture that automatically adapts to changing website layouts to ensure reliable automation. This gives developers a robust framework for integrating advanced, flexible web interaction capabilities directly into their AI applications.

A newly posted interactive guide explaining LLMs based on an Andrej Karpathy lecture faced backlash from readers who accused the project of being low-effort, AI-generated slop. Although commenters initially dismissed a specific statistic about hard drive storage capacity as an AI hallucination, the figure was actually a slightly rephrased line from Karpathy's original video.

A new open-source project named Gova was recently introduced on Hacker News as a declarative graphical user interface framework for the Go programming language. It aims to streamline the process of building applications for Go developers. The source code is publicly available on GitHub for the community to explore and contribute to.

The new open-source extension Honker brings PostgreSQL-style NOTIFY/LISTEN messaging semantics directly to SQLite databases. It equips developers with durable queues, event streams, pub/sub functionality, and a built-in scheduler. This significantly expands the lightweight database system's capabilities for building real-time, event-driven applications.