Open-source alternatives to LifeRestart

Carp is a statically typed Lisp compiler that compiles Lisp-like syntax directly to C source code, enabling seamless integration with existing C libraries and low-level system programming. It manages memory deterministically at compile time using ownership tracking and linear types, eliminating garbage collection pauses and runtime overhead while ensuring type safety through an inferred static type system. The language distinguishes itself through compile-time macro expansion and metaprogramming capabilities, allowing code generation and transformation before final binary output. It enforces

Cataclysm-DDA is an open-world survival game and turn-based roguelike set in a post-apocalyptic world. It functions as a simulation where players manage resources, engage in combat, and handle character progression in an environment where time only advances when the player takes an action. The project includes a procedural world generator that creates randomized, persistent environments and city layouts, ensuring unique maps for every new game session. The simulation covers tactical movement and resource management through turn-based strategy gameplay. It also provides options for personali

Dialogic is a dialogue editor and runtime system for the Godot engine that provides a complete framework for creating branching conversations with characters, animations, and state management. At its core, it functions as a branching narrative editor with visual and text-based timeline authoring, a character animation manager that handles portraits and scene positioning, a localization tool that exports timelines to CSV for translation, and an interactive framework that manages player choices, text reveals, voice lines, and dynamic text effects within conversations. What distinguishes this sy

gofakeit is a Go library for creating realistic synthetic datasets and populating Go structs with mock information. It functions as a deterministic data generator, allowing for seedable random number generation to ensure reproducible datasets for software testing. The project distinguishes itself by providing a mock data API server that exposes generation functions as HTTP endpoints and a synthetic dataset exporter for producing files in CSV, JSON, and XML formats. It also includes a command-line interface for generating mock data directly from the terminal. The library covers a wide array o

PathOfBuilding is an offline build planner and character stat simulator for Path of Exile. It functions as a gear and skill modeler and a passive tree mapper to help users design characters by simulating combat statistics, passive skill trees, and gear combinations. The tool provides a simulation environment for testing item crafting outcomes and gem socket combinations to determine optimal loadouts. It also enables passive tree optimization by planning node allocations and jewel placements to maximize character power. The software covers character stat simulation for offensive and defensive

This is a documentation and sample project for learning Unreal Engine's Gameplay Ability System (GAS), focused on building networked gameplay abilities that synchronize correctly in a multiplayer environment. The project provides a step-by-step guide to implementing GAS, covering the core concepts of defining gameplay mechanics through a data-driven attribute system that separates ability logic from character state management. The documentation explores key architectural patterns for multiplayer ability design, including a predicted-action network model that uses client-side prediction and se

rippled is a peer-to-peer node implementation for the XRP Ledger. It serves as a distributed ledger consensus engine and a blockchain API gateway, allowing servers to validate transactions and maintain a shared, immutable sequence of ledger state. The project features a built-in decentralized exchange engine capable of executing atomic cross-currency payments and managing order books. It includes an on-chain asset management system for issuing and controlling fungible tokens and NFTs, as well as a Byzantine Fault Tolerant system for coordinating validators. The platform provides comprehensiv

Fuel Core is a Rust-based implementation of a distributed ledger and a full node for the Fuel v2 protocol. It functions as a layer 2 blockchain client designed to execute binary encoded transactions and synchronize shared state across a decentralized network. The system utilizes a deterministic state machine to ensure all nodes reach the same ledger state and employs a binary-encoded message protocol for network communication. It provides the ability to operate full network nodes or bootstrap private local instances for development and testing. The project covers a broad set of capabilities

Warriorjs is a programming game framework and code-based logic puzzle where players write code to control characters and solve strategic combat challenges. It serves as an educational coding game designed to teach programming logic and algorithmic thinking through a series of combat scenarios. The project functions as an extensible game engine that allows the addition of new universes, levels, abilities, and units via independent package extensions. It also provides tools for custom level design, enabling the creation of challenges for other players to solve. The system manages game entity d

NetHack is a roguelike dungeon crawler and ASCII-based role playing game. It is a turn-based adventure game featuring permanent character death and the exploration of randomly generated dungeons. The project serves as a cross-platform game engine designed to be compiled and run across diverse operating systems and hardware architectures. It focuses on retro game preservation by maintaining classic game logic for modern computing environments. The codebase implements procedural content generation for maps and encounters and utilizes a grid-based coordinate system for spatial tracking. Renderi

A Dark Room is a minimalist text-based survival game that blends incremental resource management with an atmospheric narrative adventure. It functions as a resource management simulation where players collect and spend limited materials to ensure survival within a text-driven environment. The experience focuses on atmospheric horror, utilizing a minimalist interface to build tension and isolation. The gameplay features a branching narrative that evolves based on player decisions and the successful management of survival mechanics, such as a fire maintenance system requiring wood consumption t

Pokémon battle simulator.

Infinigen is a procedural 3D scene generation framework that creates photorealistic indoor and outdoor environments for computer vision training data. It combines constraint-based object placement, GPU geometry shaders, and ground-truth rendering passes to produce scenes with depth, normals, and segmentation masks alongside final images. The framework distinguishes itself through modular asset composition, a node-graph material system, and physics simulation integration that embeds rigid-body and fluid dynamics directly into the generation pipeline. Procedural rule-based scene composition and

Chance is a JavaScript library for generating random data, designed to produce realistic test data for automated tests and prototypes. It uses a Mersenne Twister pseudo-random number generator that accepts an optional seed value, enabling reproducible sequences of random values across multiple runs. The library provides a wide range of generators for common data types, including random integers, floats, booleans, characters, strings, and dates, all with configurable ranges and character pools. It can generate realistic geographic data like addresses, as well as financial data such as credit c

Lean is an algorithmic trading engine and quantitative finance platform designed for the development, backtesting, and live execution of automated trading strategies. It provides a comprehensive framework for processing time-series market data, managing multi-asset portfolios, and conducting quantitative research across diverse financial markets. The platform distinguishes itself through a modular, event-driven architecture that decouples strategy logic from data ingestion and brokerage connectivity. By utilizing standardized interfaces for data providers and brokerage abstractions, it enable

Space Station 14 is a C# multiplayer game and roleplay simulation framework. It is built upon an Entity-Component-System (ECS) game engine that separates logic into systems and data into components to manage complex entity interactions. The project functions as a grid-based physics simulator with a YAML data-driven prototype system for defining game objects. The project features a specialized 2D sprite rendering engine that maps server-side appearance data to client-side shaders. It implements a networking model with client-side prediction and dirty-flagged state synchronization to reduce inp

gremlins.js is a JavaScript stress testing framework and web UI monkey testing library. It functions as a browser chaos testing tool that automates random interactions with DOM elements to identify stability issues, unexpected crashes, and edge-case bugs in web applications. The tool utilizes a seeded-random interaction engine to ensure test sequence repeatability, allowing specific failure sequences to be recreated for debugging. It supports the definition of custom interaction rules and pluggable strategies to target specific application behaviors through weighted-probability action dispatc

Grasscutter is a private game server emulator designed to replicate game backend logic and simulate core gameplay mechanics without the use of official servers. It functions as a system for simulating character progression, world entities, and general backend simulation to host a private instance of a specific anime game. The project includes a game object management console for spawning entities and controlling player inventories within the simulated environment. It also provides a server configuration tool featuring a guided interface to generate and manage the settings and configuration fi

Faker is a PHP library for creating realistic synthetic data used for testing, prototyping, and populating database entities. It serves as a test data generator and localized mocking tool capable of producing synthetic names, addresses, and identifiers specific to various countries and languages. The library provides mechanisms to ensure data consistency and quality, including deterministic seeding to produce identical data sequences across executions and stateful uniqueness tracking to prevent duplicate values. It also supports probability-weighted optionality to simulate missing data and cu

xtensor is a C++ multidimensional array library for numerical computing that provides N-dimensional containers with an interface mirroring the NumPy API. It utilizes a lazy evaluation expression engine to defer numerical computations until assignment, which minimizes memory allocations and intermediate copies. The library features a foreign memory array adaptor that allows it to wrap external buffers, such as NumPy arrays, to perform numerical operations in-place without duplicating data. It further optimizes performance through lazy broadcasting and a system that manages the lifetime of temp

Endless Sky is an open-source space trading simulation, 2D space combat simulator, and narrative exploration game. It functions as a plugin-based game engine that allows users to explore a vast universe, engage in tactical ship battles, and progress through a central plot within a sandbox environment. The project is distinguished by its highly moddable architecture, utilizing a directory-based plugin system and data-driven entity definitions to allow for content extensions and behavior overrides without recompiling source code. It further supports visual customization through programmable ver

learn-gdscript is an interactive coding course and tutorial application designed to teach GDScript programming fundamentals. It functions as a game engine education tool that allows absolute beginners to study basic programming concepts, variables, and functions. The project utilizes a sandboxed environment for practicing code execution and provides in-engine interactive tutorials. It features guided walkthroughs that direct users through editor interfaces to help them locate and understand software tools. The curriculum covers game development logic, including the implementation of physics-

Mock is a JavaScript API mocking tool and network request interceptor designed to decouple front-end development from back-end progress. It functions as an API simulation tool and mock data generator, allowing developers to build user interfaces and high-fidelity prototypes by mimicking the request and response cycle without a live server. The system provides a mechanism for intercepting outgoing HTTP calls and returning simulated data. It enables front-end prototyping by generating synthetic datasets to validate application behavior during automated testing cycles and development. Capabilit

Mirror of Simutrans SVN Repository

OpenTTD is an open-source game engine and transport simulation game. It provides an isometric sandbox environment for building and managing complex logistics and transport networks. The project functions as a multiplayer simulation sandbox where users can build infrastructure cooperatively or competitively in a shared virtual world. The platform is designed as a moddable simulation system that supports external assets, graphics, and gameplay modifications. It includes mechanisms for downloading and integrating add-on content and utilizes a plugin-based system to extend game mechanics beyond t

Unknown Horizons official code repository

cmatrix is a C-based terminal application and command line utility designed to simulate a scrolling digital rain effect. It functions as a CLI visual animation tool that renders falling code patterns and custom text displays within a terminal emulator. The application provides options for visual style customization, allowing users to modify color schemes, font styles, and character sets. It includes animation speed control to adjust the rate of falling characters and supports rendering specific custom messages in the center of the screen during the animation.