Ondřej Žára

Online Mindmapping Software

WWW SQL Designer, your online SQL diagramming tool

ROguelike Toolkit in JavaScript. Cool dungeon-related stuff, interactive manual, documentation, tests!

JS port of primitive.lol

Sleeping Beauty: a game created for the 7-day Roguelike 2014 challenge. Coffeebreak length.

The Royal Wedding – coffebreak roguelike with story, lighting, zombies and (sometimes) lutefisk!

Star Wars Miniature - The GitHub Game Off 2012 submission

TypeScript port of a board game by Horrible Games

Control Your Player: a Web-based MPD client

Custom Tetris - The GitHub Game Off 2013 submission. Modular Tetris game that offers configurable sides and multiplayer.

WebGL + Web Audio API = Sound-driven fireworks!

Configurable JavaScript oscilloscope

Utility library for programmatic screenshots via getDisplayMedia

Where semantic HTML meets interactive slide deck

CSS Rubik's Cube

Generates module dependencies graph, using the DOT language.

Goldfish: a game created for the 7-day Roguelike 2017 challenge. Playable, winnable, losable. Features colorful and aesthetic maps, aquatic fauna and fishermen!

Your daily cup of server-side Javascript.

Dr. Drago's Madcap Chase: HTML5 remake of an old game by Blue Byte Software. Fully playable with cool graphics, animations, sounds and music!

A two-pane file manager

Ultra-fast bitmap font renderer

<little-planet> Custom Element: interactive panorama viewer

Tiny browser-based Promises/A+ implementation

Café Havoc: a game created for the 7-day Roguelike 2016 challenge

Web Workers used to process photos

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The Conception: a game created for the 7-day Roguelike 2013 challenge. Contains hexagons. And chlamydia. And much more.

Simple image viewer for nw.js and Electron

Dobble / Spot it! with Emoji

Visualizing GPS EXIF data on a map

js-like, the JavaScript Roguelike. Heavily inspired by ADOM.

Hybrid music player

Slide deck system written in Elm

My Adafruit Macropad setup

Multiplayer 2d space dogfighting game

Simulating particle systems with WebGL

Scalable Markdown-based HTML slide deck

Create SVG images/favicons from emoji

<instant-button> web component

Here be dragons! Curved dragons in particular. At least several generations of then.

simple service monitoring

A non-JavaScript experiment: fully featured presentation system, using only HTML + CSS

Tiny WebSocket <-> MPD bridge

Tiny but smart JS assistance for advanced coders

Small testbed game: hexes, trains, procedurally generated terrain.

Exploring innovative and aesthetical aspects of an ASCII game

Turbo Visionary: bringing back the 90s IDE styling

A sample need-based AI implementation

ES6+/TS boilerplate

Showcase of panoramic photos taken with a DJI Mini 3 Pro

Rogue Sea: a game created for the 7-day Roguelike 2021 challenge. Features ships, cannonballs, bitmap tiles, spatial audio and a nontrivial amount of piratey talk.

Rogue Zombies: a roguelike game created for the 2024 7DRL challenge. Warning: they will get you.

A screenplay stylesheet

Canvas & Web Workers Demo

Warden's Duty: a game created for the 7-day Roguelike 2015 challenge. Lacks the traditional roguelike map and features over-sized ascii glyphs. You cannot really win this game, but you can try to get deeper than others.

The Curse of the General Sibling Combinator: a game created for the 7-day Roguelike 2019 challenge. Implemented only in CSS. Coffeebreak length.

EventTarget polyfill for IE8

Traditional "atoms" game, well-known from Windows 3.1. Up to four players; local play with bots, multiplayer using Firebase.

Drawing in multiplayer (server needed)

Mozilla DevDerby Demo

Realtime chord detector

Creates SVG maps for the "Expres" game (also known as Dampfross, Railway Rivals)

Google Code mirror

Mozilla DevDerby Demo

Two-pane file manager

Produces a perfect maze and finds the path between two corners. In perfect maze, every two cells are connected with exactly one path.

CSS Blockout implemented using CSS 3D transforms. Submitted as a demo to Mozilla Dev Derby.

Forwarding remote notifications to a local machine

Helping you select an MV* framework - Todo apps for Backbone.js, Ember.js, AngularJS, Spine and many more

Web Component for Roguelike games

Pluggable A-STAr implementation in TypeScript

Universal web-based MIDI router. Filtering, transposition, localStorage persistence. Useful if you are too lazy to learn scales.

Collection of AutoHotkey scripts that I use.

Create polar panoramas from equirectangular images

Experimenting with custom implementation of document.write

Clickmania: JS port of a well-known time-killer

Rect-to-polar image converter

Sudoku solver

Experimental tile-based engine with multi-tile entities

Experimental sketches

The Great Train Robbery: a roguelike game created for the 2026 7DRL challenge.

Cute CSS-only animation

Texty a zdrojové kódy ke knize "JavaScript: řešené úlohy"

NEtworked MUltiplayer WIP

E-mail canvas hash: visualizing e-mail addresses using various algorithms

Shadow cube (particularly known from GEB) generator

A roguelike for arduino.

Elite: Dangerous Keyboard Map

Adventure Game Engine, suitable for playing interactive gamebooks

Worm simulation using HTML <canvas>

Browser-based arena for simple but interesting fights of JavaScript AIs, based on a child's play

Recursive implementation of Peano/Hilbert curves, using canvas transformations

JavaScript fireworks using elementary mechanics, <canvas> and <audio> tags

impl Mastermind for Rust {}

<fix-me> and <to-do> web components

Image → STL → Roller → Cookies

Display monospace fonts from the "codeface" project in a roguelike-compatible fashion

Generating and rendering chord diagrams

Ondras's Genetic Algorithm Runner

CloudFlare Speech app

Homepage Docker image generator. Uses Deno and the GitHub API.

Multi-architecture Dockerfile build for an old-school PHP website deployment

Create your own map+pano website by forking this repo!

<x-ample> Web Component for interactive JS examples

Brain Defense: zombies & lasers. What could go wrong?

Multiplayer-based geometry game

A curated list of awesome applications, macros, 3D printed cases, guides, and more for the Adafruit CircuitPython rp2040 MacroPad.

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Shooting the π. Made for the 2016 pi day.

PHP library for easier MVC workflow, based on XSLT.

A personal knowledge base

A stylable replacement for <input type=range>

Wasabi+Duplicity

Generate QR code based on the Referer header

A minimalistic Jasmine test driver

Mobile geocaching client

A semi-interactive homage to Kurt Vonnegut

Elm IRC client library

Google Code mirror

WebSocket <-> IRC bridge

RE-based syntax highlighter, implemented in Javascript.

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Geographic projections, spherical shapes and spherical trigonometry.

Python implementation of ua-parser

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novaGallery - a beautiful and and ease to use php image gallery for your photos - flat file - no database required - modern responsive design

Control WS2812B and many more types of digital RGB LEDs with an ESP32 over WiFi!

Documentation for the WLED project (kno.wled.ge)

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Framework for Actions, Components and Entities

Elgato Stream Deck TOTP plugin

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Dockerfile for Alpine-based rspamd images

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WSL2 utilities

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Software MIDI keyboard with non-standard layouts

Simple JS (photo|video|pano)-gallery via the <oz-gallery> custom element

Html Infrastructure for Turing Machine ANalysis

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HDD S.M.A.R.T exporter for Prometheus written in Python

The awesome document factory

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Dōbutsu shōgi

SQL schema for PID GTFS

Photos from traditional children summer camp with long history and unique atmosphere

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Derivative Captcha - an accessibility experiement

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Kuchařka, a personal cookbook

The old, original version of the WWW SQL Designer. Archived for historical purposes.

Bilingual Poster

Connecting Wordle producer with a Wordle consumer

Everything related to the node-red home setup

My git-specific mappings for the "inkkeys" macropad

https://there.oughta.be/a/macro-keyboard

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Deno's documentation

Tower of Hanoi, running on an ES8266 with a tiny 64x48 OLED display, written in MicroPython

Studijní materiály pro DA Web na kodim.cz

Plays the famous Numberwang game on Twitter

Style your readme using CSS with this simple trick

JSON-RPC for Deno

Node's "dgram" module for browser

Atom's "Project find" within the current directory

Various custom filters for Pandoc

An abandoned attempt to port the Netwars game to JavaScript.

Some fine photos taken with my old and crappy Fujifilm FinePix S5000

A selection of photos taken at Sluneční zátoka

Interactive SVG Sun, logo for Sluneční zátoka

API s informací o českých státních svátcích

Program to decode radio transmissions from devices on the ISM bands (and other frequencies)

nodeRED node to run & output messages from rtl_433

service worker test

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Visualize GNU Make data base

A secure JavaScript and TypeScript runtime

deno.land website

Extension for google chrome to viewing fast rpc requests.

make your own ugly sweater

Misc files

8-bit Programmable Synthesizer Module

Esoteric Programming Language

Orca's best friend.

An API documentation generator for JavaScript.

The MPD website

Music Player Daemon

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Test suites for Web-platform specs — including WHATWG, W3C, and others

Simple template project for developing restartless Firefox Developer Tools addons.

Rollup demo website

FastRPC library

JAK je kompaktní a jednoduchý systém volně provázaných knihoven, usnadňující práci v prostředí jazyka JavaScript.