Cool Software Projects
SubmitSome of the most inventive software comes from individual developers and small teams sharing what they built. This section gathers those projects, presented by their creators, covering open-source libraries, developer tools, productivity apps, games, and technical experiments that push familiar ideas in new directions.
Typical entries include command-line utilities, self-hosted alternatives to popular services, clever browser extensions, programming language experiments, and side projects that solve a niche problem unusually well. Many come with source code, a live demo, and creators answering questions about how they built them.
These projects are a reliable source of practical tools and fresh ideas. Developers discover libraries worth adopting, makers find inspiration for their own work, and anyone curious about software gets an early look at projects that may grow into widely used products.
2026-05-21
The launch of a new peer-to-peer platform named Freenet has sparked backlash after a dormant board repurposed the original project's funding and name to build a new system that abandons anonymity. The ousted original development team continues their censorship-resistant and privacy-focused work under the rebranded name Hyphanet. Critics accuse the new Freenet of capitalizing on the original project's legacy while fundamentally diverging from its core design principles.
CommentsA developer reverse-engineered Apple's dynamic video wallpaper feature to create Phosphene, an open-source tool for macOS. The project enables users to apply any custom video as a desktop or lock screen background directly through the native System Settings menu.
Comments2026-05-20
Forge is a new Python framework that enables self-hosted large language model tool-calling and multi-step agentic workflows. By implementing specialized guardrails, the project boosts the performance of an 8B model on agentic tasks from 53% to 99%.
Comments2026-05-19

Show HN: Gaussian Splat of a Strawberry
2026-05-19A Hacker News user has shared a highly detailed 3D Gaussian splat of a strawberry captured from 90 distinct perspectives. To achieve this level of realism, the creator used a Nikon Z8 and a macro lens to shoot 88 focus-stacked images for every single angle.
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A new game called Number Gacha, featured on Hacker News, distills the popular gacha genre down to its absolute core mechanics. The minimalist project challenges players to collect all 100 unique numbers in a simplified gaming experience.
Comments2026-05-18
Files.md is a newly launched open-source application designed as a simpler alternative to Obsidian for managing Markdown files. It offers a private and distraction-free environment intended to serve as a quiet space for focused thinking.
CommentsMinishLab has introduced Semble, a fast and accurate code search tool specifically designed for AI agents. It significantly reduces processing time and API costs by consuming approximately 98% fewer tokens than traditional grep and read commands.
CommentsThe new macOS utility Auto-identity-remove automates the tedious process of opting out of data brokers and people-search websites. Running on a monthly schedule, the open-source tool continuously removes personal information from over 30 different databases to help protect user privacy.
Comments2026-05-16
Rocksky is a new music scrobbling and discovery platform built on the AT Protocol, despite being described in its launch as a next-generation social coding platform. Showcased on Hacker News, the application primarily allows users to track their listening habits and explore new music.
Comments2026-05-15

A new interactive project allows users to watch a neural network train itself to play the classic game Snake. While the AI can achieve near-perfect scores on a small grid, observers note that the model's performance eventually collapses. Users speculate this degradation is caused by numerical instability, flawed reward structures, or the snake getting trapped in an endless loop when it runs out of space.
CommentsShowcased on Hacker News, an open-source GitHub project implements a custom nibble-oriented CPU in Verilog to build a scientific calculator. The repository documents the complete hardware design process from basic FPGA gates to a functional device and welcomes community contributions.
Comments2026-05-14
Show HN: Nibble
2026-05-14A new open-source project named Nibble allows developers to generate LLVM IR without using malloc or relying on external dependencies. The lightweight tool is available on GitHub and is designed to be entirely self-contained. This makes it a highly practical solution for low-level code generation in constrained environments.
CommentsOblivious DNS over HTTPS is a protocol that separates user identity from DNS queries without requiring account sign-ups. A developer has released Numa v0.14, an MIT-licensed tool for deploying clients and relays, alongside the launch of the second public ODoH relay to expand the anonymous DNS ecosystem.
Comments2026-05-12
Cactus Compute has released Needle, a lightweight foundation model that distills Google Gemini's tool-calling capabilities into just 26 million parameters. Weighing only 14MB, the model can process up to 6,000 tokens per second on resource-constrained hardware. This enables advanced, local AI functionalities on tiny devices like mobile phones, wearables, smart home systems, and robots.
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Hopper is a new agentic TN3270 terminal emulator that brings modern AI capabilities to legacy mainframe and COBOL environments. The tool allows AI agents to autonomously navigate ISPF, write column-strict JCL, debug failed jobs, and query VSAM directly within z/OS.
CommentsGigacatalyst is an embedded AI builder that allows SaaS customers to generate custom frontend user interfaces on the fly using natural language prompts. The tool sandboxes the generated code to keep it independent of the core application, ensuring safe and easy sharing of new features without relying on third-party plugins. Currently serving over 2,000 daily users, the platform reflects a broader industry shift toward highly customizable, AI-driven enterprise software.
CommentsA new project named rockboxd introduces a modern, network-enabled music player daemon built upon the classic Rockbox firmware. This platform brings contemporary networking capabilities to the established audio technology, enabling seamless music management and streaming.
CommentsIntroduced on Hacker News, Statewright is a new open-source project that uses visual state machines to implement guardrails for AI agents. By restricting behaviors to defined operational states, the tool aims to make autonomous AI systems more reliable. Developers can find the source code and contribute to the project on GitHub.
Comments2026-05-11
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.
Comments2026-05-10
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.
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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.
Comments2026-05-09
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.
CommentsShow HN: Rust but Lisp
2026-05-09A 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.
Comments2026-05-07
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.
Comments2026-05-06

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.
CommentsShow HN: Hallucinopedia
2026-05-06Hallucinopedia 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.
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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.
Comments2026-05-05
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.
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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.
Comments2026-05-03
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.
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