Stefan Oltmann

Stefan Oltmann

Building apps with Kotlin 🚀

Forums

Stefan Oltmann•

2d ago

Mines+ - No guessing. Just logic. Solvable Minesweeper.

Mines+ is a beautiful, fair Minesweeper game built for pure logic. Every board is solvable without guessing, so no 50/50 losses. Enjoy a clean modern design, customizable difficulty, dark and light mode, offline play, and no data collection.
Stefan Oltmann•

4d ago

MapsNotIncluded - ONI Seed Browser - Easily find the best maps for Oxygen Not Included

The tool allows a large database of maps to be quickly searched using complex criteria, making it easy to discover interesting maps. Each map’s properties are presented in a clear and visually appealing way, enabling quick overviews and easy comparisons. It's free for everyone.
Stefan Oltmann•

1d ago

PixelSafe - Free open-source tool to hide data within PNG images

Steganography allows you to conceal information in plain sight, making it invisible to the casual observer. With PixelSafe, you can embed any file into a screenshot, with optional encryption. Works fully offline, with all data processed locally on your device.
Stefan Oltmann•

3d ago

EXIF Viewer - Dive into image metadata, all the way down to raw hex.

Inspect a wide range of image formats. Fully open source and runs entirely in your browser with no uploads or external processing.
Stefan Oltmann•

5d ago

Thumbnail Fixer Pro - Repair & enhance embedded thumbnails

Slow photo browsing is often caused by broken or low-quality thumbnails. Thumbnail Fixer rebuilds embedded thumbnails for instant, sharp previews across Windows Explorer, Apple Finder, Mylio, ACDSee, Ashampoo Photo Organizer, and more.