We are a technology and productivity lab. We take raw concepts and transform them into refined, efficient, high-value tools.
Discover our projectsDiscover the hidden gems of the gaming universe. GemScore reveals underrated titles through proportional engagement metrics — giving visibility to works that deserve to shine. With deep data tiers for content creators, journalists, and enthusiasts.
The command center for your productivity. Time tracking, Kanban boards, and task checklists unified in a single fluid interface. For personal use or small teams.
Organize your web in layers. Shale is a bookmark manager that lets you group favorite sites into collections — like the layers of the stone that gives it its name. Simple, fast, and straight to the point.
An evolution of spaced learning. Far beyond traditional flashcards, Slate is a high-performance platform for college entrance exams and competitive tests, with integrated question banks and intelligent spaced repetition.
A high-performance local Git interface. Designed to expose the true structure of your code, without useless abstractions. The bedrock of your development history.
The spark that ignites systems. Flint is a systems programming language with a compiler built in Rust, created as an MVP to power HearthOS. Open source and built for scale.
Open SourceAn operating system built from scratch for educational and research purposes. Developed in Flint, HearthOS explores computing fundamentals with real expansion potential. Open source.
Open SourceWe build real tools — from productivity utilities to an operating system written from scratch. No VC, no hype, no bloat.
Cutstone Labs was founded on a pragmatic premise: quality software is built by solving concrete problems, not chasing market trends. Our first product — GemScore — was born to fill a real gap: the absence of proportional analytical metrics for audience size in the gaming sector. The system we developed exposes works of high relative engagement that absolute metrics ignore, offering layered data for content creators, journalists, and enthusiasts.
From this initial validation, Cutstone expanded its scope to house a diversified portfolio of projects — each with its own product thesis, technical governance, and maturity stage. We operate as a development lab: lean structure, with priority on engineering quality rather than artificial growth.
Analytics platform for the gaming market. Proportional engagement data, tiered structure.
Bookmark manager with layered organization. Already publicly available.
Spaced learning platform built for high performance in college entrance exams and competitive tests.
Unified command center for time tracking, Kanban boards, and task checklists.
Systems programming language with its own compiler. Designed to scale.
Operating system built entirely on top of Flint. Applied research in computing fundamentals.
Native desktop Git GUI. Branch visualization, history, and conflict resolution with stability as the foundation.
We keep building at the sweet spot between practical utility and hardcore curiosity. Some projects become commercial products (B2C or B2B). Others are pure research, open-sourced on GitHub because we believe knowledge of operating systems and compilers should not live behind paywalls. That balance is our north star.
Every refined piece of software starts as a raw idea. Cutstone exists to make that cut.
Cutstone means "cut stone" or "lapidary stone". But the name did not come from a branding exercise — it came from a purpose that emerged before the studio even existed.
Our first project, GemScore, was created with a dual mission: to reveal the hidden gems of the gaming market and provide data so indie creators could themselves polish their works with intelligence. The metaphor of a rough gem being transformed into something of value was too precise to fit into a single product. It demanded a home.
That is how Cutstone was born. Not as a collection of random projects, but as an entire lab dedicated to a single philosophy: taking raw ideas and sculpting them until they serve a real purpose.
Each project in the hub carries the name of a rock, stone, or mineral. No name is arbitrary — each one literally describes what the software does.
The story of someone who never stopped building — from GameMaker games to productivity platforms.
I am Matheus. My first contact with technology was at age 11, through IT and web design courses. But the real spark ignited in 2015, when I was 14, starting a two-year journey developing an RPG in GML on GameMaker — programming manually, letter by letter. That is when I understood that creating software was not just writing code: it was bringing entire systems to life.
This passion became a profession in 2021, when I joined technology and education as a PIBIC researcher at UFSC, developing educational games. In the same year, I landed my first formal job as a Flutter developer. Since then, I have accumulated over 5 years of experience as a Mobile and Fullstack Software Engineer, working on high-complexity projects — offline-first architectures for R&D, VoIP app performance optimization, and critical fixes in native and hybrid ecosystems.
But the desire to build my own things with total autonomy never faded. That is how Cutstone Labs and Overflame Studios were born: two labs where I turn raw ideas into polished solutions. On one side, tools and platforms like Quartz, Slate, and GemScore. On the other, my next game — coming soon. 🤭